Motor Behavior Exam 2

ATNR

STNR

Optical righting reflex

Labyrinthine righting reflex

Body-on-head righting reflex

Neck-on-body righting reaction

Body-on-body righting reaction

Tilting reactions

Protective reactions

ATNR reflex

extension in the face arm, flexion in the skull arm when the head is turned

STNR reflex

head flexion causes flexion of the upper extremities and extension of the lower extremities

head extension causes extension in the upper extremities and flexion of the lower extremities

Optical righting reaction

Orients the head to visual vertical

Labyrinthine righting reaction

Orients the head in response to vestibular signals signaling vertical

Body-on-head righting reaction

orients head to vertical via tactile and neck proprioceptive information

Tilting response emergence order by position

prone, supine, sitting, all fours, standing

protective reactions

protects the body from injury resulting from a fall

order of direction in protective reaction emergence

forward, side-ways, backward

Moro response

When the chaotic movements of the head are stabilized in a neonate, movements and behaviors normally seen in more mature infants emerge

What is the typically milestone age for sitting without support

6 months

Which sensory system develops first in infants

visual system

Around what age does visual dominance begin to decline

3 years

when do stepping synergies emerge typically

15 months

when do active hip control and hip synergy emerge

4 years

When does adult-like postural control emerge

around 7 years