Long-chain PUFA (LCPUFA) supplementation of formula can have beneficial effects on neurodevelopmental outcome in early infancy, but uncertainty exists regarding effects after 6 months. The present study is the first to investigate whether consumption by term infants of formula containing LCPUFA for the first 2 months after birth improves neurological condition of these children at 9 years of age. A prospective, double-blind, randomised control study was performed in two groups of healthy term infants: a control group with standard formula (n 169) and a LCPUFA-supplemented group (LF; n 146). A breast-fed group (BF; n 159) served as a reference. At age 9 years, children were neurologically assessed according to Touwen, resulting in a Neurological Optimality Score and information on severity and type of minor neurological dysfunction (MND). Information on potential confounders was collected at enrolment and follow-up. Multivariate analyses were carried out to evaluate the effect of nutrition while adjusting for confounders. Attrition (28 %) was selective: drop-outs in the LF group were more often boys and had a significantly lower mental developmental index at 18 months. Neurological optimality and severity and type of MND at 9 years did not differ between the two formula groups. Children in the BF group showed significantly less often fine manipulative dysfunction than formula-fed children. In conclusion, LCPUFA supplementation of formula during the first 2 postnatal months in healthy term infants does not alter neurological function at school age. The study confirmed that breast-fed infants have a slightly better neurodevelopmental outcome than formula-fed infants.

DHA and arachidonic acid (AA) are important for neurodevelopment. A traditional neonatal neurological examination and the evaluation of general movement quality are sensitive techniques for assessing neurodevelopment in young infants. Mildly abnormal general movements at 3 months have been associated with a non-optimal current brain condition. We investigated whether supplementation of DHA during pregnancy and lactation influences the infant's brain development and whether additional AA modulates this effect. Healthy women were randomly assigned to DHA (220 mg/d, n 42), DHA+AA (220 mg each/d, n 41) or control (n 36), from about week 17 (range 14–20 weeks) of pregnancy until 12 weeks postpartum. The control and the DHA+AA groups had approximately comparable dietary DHA/AA ratios. The standardised neonatal neurological examination was carried out at 2 weeks. General movement quality was assessed at 2 and 12 weeks. Neither DHA alone nor DHA+AA influenced outcomes in the traditional examination. General movement quality of infants in the DHA group was lower than that of infants in the other two groups, especially at 12 weeks: 61 % of the infants in the DHA group showed mildly abnormal general movements compared with 31 % in the control group (P = 0·008) and 34 % in the DHA+AA group (P = 0·015). We conclude that general movement quality at 12 weeks is sensitive to the maternal dietary DHA/AA balance.

This study evaluated the effect of specific postural support on motor behaviour of infants with and without minor neurological dysfunction (MND). The following questions were addressed: (1) Does application of supportive pillows affect the time during which the infant exhibits general movements (GMs) or specific movements? We defined specific movements as movements of specific parts of the body that occur in a specific, recognizable way. (2) Does application of pillows improve the quality of GMs or the repertoire of specific movements? (3) Is a pillow effect affected by neurological condition? Forty healthy, term infants (16 males, 24 females; mean age 3.04m [SD 1.24mo], range 1–5mo) participated in the study. Twenty were neurologically normal and 20 had MND. Spontaneous motor behaviour in a supine position was video-recorded for 180 seconds in four conditions applied in random order: support by a pillow in (1) the shoulder region, (2) the pelvic region, (3) the shoulder and pelvic region, or (4) no pillow support. Two independent assessors evaluated the quality of GMs. The other movement parameters were assessed with a computer program. Duration of movements was determined and a variation index, consisting of the number of different specific movements in a condition, was calculated. The presence of pillows did not affect the time spent in GMs, specific movements, or GM quality in either group. In neurologically normal infants the shoulder pillow with or without pelvic pillow induced an increase in the variation index (p<0.01), whereas in the infants with MND, all pillow conditions resulted in a substantial increase of the movement repertoire (p<0.001). Our results demonstrate that specific postural support promotes variation in motor behaviour of young infants. This is particularly true for infants with MND.

Children with developmental disabilities often show a variety of associated impairments that lead to a lifelong need for additional care. Careful assessment of these impairments is required not only for diagnostic purposes but also to inform the parents about the expected additional care needs in the future. We present a systematic review of the literature to identify instruments that classify the type and amount of this care for the individual child. A literature search was performed in the Medline database (January 1966 – June 2005) on instruments that classify the type and amount of expected additional care needs in the future. Seven standardized measurement instruments describing current additional care needs were identified, but none of these instruments was developed to provide information about the expected need for additional care in the future. For parents of young children with non-progressive developmental disorders it is essential to be informed on the expectations of required additional care in the future. However, comprehensive instruments providing such information are currently lacking and, thus, need to be developed.

Assessment of the quality of general movements (GMs) in early infancy is a powerful instrument to predict cerebral palsy (CP). The aim of the present study is to explore the value of GM assessment in predicting minor neurological dysfunction (MND) at 9 to 12 years of age. Two groups of infants were studied prospectively: 28 low-risk full-term infants (11 females, 17 males) and 24 high-risk infants, mostly born preterm (<37 weeks; 11 females, 13 males). In each group the quality of GMs (normal or abnormal) was assessed during two developmental periods: the age at which ‘writhing’ GMs occur (36 weeks' postmenstrual age to 7 weeks' postterm) and the age at which ‘fidgety’ GMs occur (8 to 17 weeks' postterm). Eight of 24 high-risk infants were diagnosed as having CP at 4 to 9 years of age. The remaining 44 children were followed-up at 9 to 12 years. In children without CP, quality of GMs at ‘fidgety age’ was related to neurological condition (normal, simple MND, complex MND) at follow-up (rho=0.46, p<0.01). Abnormal GMs at ‘fidgety-GM age’ showed a specific relationship to the development of coordination problems (χ2=6.1, p=0.01) and fine manipulative disability (Fisher, p<0.05) at 9 to 12 years. This finding supports the notion that the quality of GMs may provide information on the integrity of complex supraspinal circuitries.

We present a systematic review on the effect of early intervention, starting between birth and a corrected age of 18 months, on motor development in infants at high risk for, or with, developmental motor disorders. Thirty-four studies fulfilled the selection criteria. Seventeen studies were performed within the neonatal intensive care unit (NICU) environment. Eight studies had a high methodological quality. They evaluated various forms of intervention. Results indicated that the Newborn Individualized Developmental Care and Assessment Program (NIDCAP) intervention might have a temporary positive effect on motor development. Twelve of the 17 post-NICU studies had a high methodological quality. They addressed the effect of neurodevelopmental treatment (NDT) and specific or general developmental programmes. The results showed that intervention in accordance with the principles of NDT does not have a beneficial effect on motor development. They also indicated that specific or general developmental programmes can have a positive effect on motor outcome. We concluded that the type of intervention that might be beneficial for infants at preterm age differs from the type that is effective in infants who have reached at least term age. Preterm infants seem to benefit most from intervention that aims at mimicking the intrauterine environment, such as NIDCAP intervention. After term age, intervention by means of specific or general developmental programmes has a positive effect on motor development.

Little is known about the development of postural adjustments during early ontogeny. We examined postural adjustments due to sudden perturbations during sitting in 40 healthy term infants (28 males, 12 females) assessed in groups of eight at 1, 2, 3, 4, and 5 months of age. Surface electromyograms of neck, trunk, and leg muscles were recorded while the infants were exposed to a random series of horizontal forward and backward displacements of the surface of support. Video recordings of spontaneous motor behaviour were analyzed. For part of the analyses, previously collected data on 26 infants aged 6 to 10 months were included. In general, postural adjustments at all ages were direction specific and showed large variation. Within the variation developmental changes could be observed, revealing a transient decrease in postural activity at 3 months of age. After this transition, direction-specific postural activity was correlated with spontaneous motor behaviour. This was true, in particular, for dorsal postural activity. The clinical relevance of these findings is discussed.

Postural control during reaching with the dominant arm was assessed in 58 preterm children with cerebral palsy (CP) aged 2 to 11 years, comprising 34 with spastic hemiplegia (17 males, 17 females) and 24 with bilateral spastic CP (bilateral CP; 15 male, 9 females). Assessments were made by multiple surface electromyogram (EMG) and kinematic recording. Mean gestational age at birth for the children with spastic hemiplegia and those with bilateral CP was 28.6 weeks (SEM 0.33) and 28.2 weeks (SEM 0.34) respectively; their mean birthweights were 1158g (SEM 58) and 1190g (SEM 59) respectively. All but one of the children with spastic hemiplegia could walk without restriction, the exception being a child who had self-mobility with limitations. In the group of children with bilateral CP, nine walked without assistive devices, 10 could walk with assistive devices, and five children needed a wheelchair for self-mobility. Comparison data of 29 typically developing children (10 males, 19 females) born at term with appropriate birthweight were available. Results indicated that in most children with CP the basic level of postural control (‘direction-specificity’, ie. muscle activation on the side opposite to direction of body sway) was intact. However, the children with CP showed dysfunctions in: (1) recruitment order of the postural muscles, i.e. they exhibited a stereotyped top-down recruitment; and (2) the ability to modulate muscle contraction (that registers on EMG) to task-specific conditions. The latter dysfunction was more pronounced in children with bilateral CP than in those with spastic hemiplegia. Postural dysfunctions were correlated to some extent with the degree of disability in everyday activities as assessed by the Pediatric Evaluation of Disability Inventory.

Precision grip and concomitant anticipatory postural adjustments were investigated in 11 children (three females, eight males; mean age 9 years 1 month, SD 11 months) with attention-deficit–hyperactivity disorder (ADHD); 12 children (three females, nine males; mean age 9 years, SD 7 months) with developmental coordination disorder (DCD), and 13 children (two females, 11 males; mean age 9 years 9 months, SD 11 months) with a combination of ADHD and DCD (ADHD+). There were two comparison groups: an age-matched group (four females, 11 males; mean age 9 years 1 month, SD 14 months) and a younger age group (five females, six males; mean age 6 years 5 months, SD 8 months). Adaptation to different weights was evaluated by lifting a specialized grip instrument monitoring grip force, load force, and centre of foot pressure displacements. Children with ADHD+ showed: (1) excessive grip forces, (2) decreased amplitude and prolonged onset of postural adjustments, and (3) reduced ability to adapt the motor output. Children with ADHD and DCD did not scale manual and postural forces in amplitude and time domains. Children with DCD also differed in delayed timing of postural adjustments. Results indicate that children with ADHD and DCD show a spectrum of neural dysfunctions underlying poor motor coordination, which are not specific to the clinical disorder.

In the past 40 years, children with minor developmental motor disorders have been studied by professionals from various fields: paediatricians, neurologists, psychiatrists, psychologists, and physical and occupational therapists. The differences in background of these professionals led to a plethora of terms used to refer to these conditions: e.g. minimal cerebral palsy, minimal cerebral dysfunction, developmental apraxia or dyspraxia, minimal brain dysfunction, sensory integrative dysfunction, and developmental coordination disorder. It was generally acknowledged that such a multitude of names was confusing and so, in 1994, an international consensus meeting of professionals from various fields agreed to use the term ‘developmental coordination disorder’ (DCD). DCD in general refers to children with normal intelligence who have poor motor coordination without clear evidence of a neurological pathology, such as cerebral palsy (CP) or muscular dystrophy. In other words, DCD is a ‘final common output’ term, without aetiological or pathophysiological foundation. The advantage of such an umbrella term is that it includes all children with motor problems that interfere with their daily life, i.e. children who deserve clinical attention. However, the disadvantage of the term DCD is its aspecificity. Indeed, it is becoming increasingly clear that children with DCD constitute a heterogeneous population with various types of motor dysfunction.

The present study addressed the question whether the deviant postural adjustments in children with spastic diplegia can be attributed to their crouched sitting position or primarily to their neural deficit. Postural adjustments during sitting in an erect and in a crouched position on a movable platform were assessed in 10 children, aged 3 to 7 years 6 months, with mild-to-severe forms of spastic diplegia and 10 age- and sex-matched control children. Multiple surface EMGs of neck, trunk, and leg muscles and kinematics of head, body sway, and pelvis were recorded during forward and backward translations. The children with normal motor development showed a distinct adaptation of postural adjustments to sitting position. The children with cerebral palsy (CP) had a deficient adaptational capacity which was more pronounced in the erect than in the crouched position. Thus, the crouched sitting position did not induce postural deficiency but seemed to offer a solution to the sensory–motor problem of the instability experienced. Children with severe diplegia exhibited a lack of direction specificity in the leg muscles during backward body sway, which points to a basic deficit in postural control. In addition, these children showed marked dysfunctions in the precise tuning of the postural adjustments to task-specific conditions. In the children with mild-to-moderate forms of CP the basic level of control was intact.

There are two major forms of developmental motor disorders: cerebral palsy (CP) and clumsiness. CP is an umbrella term covering a group of non-progressive, but often changing, motor impairment syndromes secondary to lesions or anomalies of the brain arising in the early stages of development. It affects about 1 in 500 live-born children. Clumsy children nowadays are classified according to DSM-IV as having developmental coordination disorder (DCD), a term denoting children who have such poor motor coordination that it affects daily activities at home and at school, but with normal intelligence and without obvious neurological pathology. The prevalence of DCD is about 10% (6 to 13%). The understanding of the motor problems in both groups of children is hampered by the large heterogeneity within each group. In both groups children differ in the expression of their motor dysfunction, in comorbidity such as the presence of cognitive and behavioural disorders, and in aetiology. In addition, the relation between the various motor disorders and the structural abnormalities of the brain is far from simple. CP is, by definition, attributed to lesions or anomalies of the young brain, but the abnormalities of the brain cannot always be visualized with imaging techniques. Despite there being some relation between lesions of the periventricular white matter and spastic diplegia, and between unilateral lesions and spastic hemiplegia, the site of the lesion does not correlate exactly with the type of motor dysfunction. In children with DCD the connection between structural abnormalities of the brain and motor dysfunction is still more ambiguous. Recently Hadders-Algra and Touwen argued that indications for pre- and perinatal brain damage can be found only in one third of children with minor motor dysfunction. This could imply that most clumsy children do not have macroscopic anomalies of the brain, but dysfunctions at the microscopic level of the nervous system, with abnormalities in the neurotransmitter or receptor systems, for example.

During the last century, knowledge of the mechanisms governing the functions of the central nervous system increased rapidly as sophisticated physiological, neurochemical, and imaging techniques developed. In the field of motor control, better understanding of neurophysiology caused a gradual shift from the concept that motor behaviour is largely controlled by reflex mechanisms towards the notion that motility is the net result of complex spinal or brainstem activity, which is subtly modulated by segmental afferent information and ingeniously controlled by supraspinal networks. Nowadays it is assumed that motor control of rhythmical movements like locomotion, respiration, sucking, and mastication is based on so-called central pattern generators (CPGs): neuronal networks which can generate complex basic activation patterns of the muscles without any sensory signals. Nevertheless, sensory information of the movement is important in adapting the movement to the environment. The activity of the networks, which are usually located in the spinal cord or brainstem, is controlled from supraspinal areas via descending motor pathways. The supraspinal activity itself is organized in large-scale networks in which cortical areas are functionally connected through direct recursive interaction or through intermediary cortical or subcortical (striatal, cerebellar) structures.

The development of postural adjustments during reaching movements was longitudinally studied in seven infants with cerebral palsy (CP) between 4 and 18 months of age. Five infants developed spastic hemiplegia, one spastic tetraplegia, and one spastic tetraplegia with athetosis. Each assessment consisted of a simultaneous recording of video data and surface EMGs of arm, neck, trunk, and leg muscles during reaching in various lying and sitting positions. The basic organization of postural adjustments of the children developing spastic CP was intact. Their main problem was a deficient capacity to modulate the postural adjustments to task-specific constraints – a deficit which was attributed to a combination of an impaired motor coordination and deficits in sensory integration. The child with spastic-dyskinetic CP showed distinct abnormalities in the basic organization of postural adjustments.

The quality of general movements (GMs) was assessed repeatedly during the first postnatal months in a mixed group of 52 children at either low or high risk for neurodevelopmental disorders. In addition, all children were reexamined at 4 to 9 years. The follow-up assessment consisted of a neurological examination and an evaluation of behaviour by means of parental questionnaires. The quality of GMs changed frequently, to stabilize in the final phase. The final GM phase is that of the so-called fidgety GMs which occurs between 2 and 4 months postterm. The quality of the fidgety GMs predicted outcome very well. Definitely abnormal GMs were associated with a high risk for the development of cerebral palsy, whereas mildly abnormal GMs were associated with the development of minor neurological dysfunction, attention-deficit–hyperactivity disorder, and aggressive behaviour.

The effects of gestational age at delivery (GA), postnatal age (PNA) and post-menstrual age (PMA=PNA+GA, an indicator of autonomous developmental processes not affected by the moment of birth) on macronutrient composition of very preterm milk were studied. Total N, fat, lactose and carbohydrate concentrations, energy density and 24 h volume were determined in 282 24 h milk samples collected at weekly intervals (days 7–55 of lactation) from seventy-nine women delivering their babies between 25 and 29 weeks of gestation. GA related differences were found for carbohydrate concentration only: carbohydrate concentration was lower with increasing GA. PNA was related to a decrease in total N and an increase in lactose concentration. PMA was not related to milk composition. Our data indicate that PNA strongly influences the development of the composition of very preterm human milk, while GA affects carbohydrate content with a negligible effect on the nutritional value of the milk. We conclude that in accordance with current opinion in paediatrics, human milk is the best source of nutrients even for very preterm (< 30 weeks GA) infants.