Early manifestation of arm-leg coordination during stepping on a surface in human neonates.
Exp Brain Res
; 236(4): 1105-1115, 2018 04.
Article
em En
| MEDLINE
| ID: mdl-29441470
ABSTRACT
The accomplishment of mature locomotor movements relies upon the integrated coordination of the lower and upper limbs and the trunk. Human adults normally swing their arms and a quadrupedal limb coordination persists during bipedal walking despite a strong corticospinal control of the upper extremities that allows to uncouple this connection during voluntary activities. Here we investigated arm-leg coordination during stepping responses on a surface in human neonates. In eight neonates, we found the overt presence of alternating arm-leg oscillations, the arms moving up and down in alternation with ipsilateral lower limb movements. These neonates moved the diagonal limbs together, and the peak of the arm-to-trunk angle (i.e., maximum vertical excursion of the arm) occurred around the end of the ipsilateral stance phase, as it occurs during typical adult walking. Although episodes of arm-leg coordination were sporadic in our sample of neonates, their presence provides significant evidence for a neural coupling between the upper and lower limbs during early ontogenesis of locomotion in humans.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Braço
/
Caminhada
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Extremidade Inferior
/
Marcha
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Locomoção
Limite:
Female
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Humans
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Male
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Newborn
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article