Posture Locomotion

Question 1

2 signs of postural damage to the spinal cord:

1. Decerebrate position: upper and lower limbs in [….]
2. Decorticate position: upper limbs in [….], lower limbs in […]

Answer 1

extension

flexion, extension

Question 2

medial brain stem pathways have their origin in the dorsal part of the [….] (of the midbrain).

These tend to travel in [….] matter tracts down an […] pathway to their muscles of […] control.

Answer 2

tectum (roof)
white matter tracts

ipsilateral pathway
postural control

Question 3

lateral brain stem pathways have their origin deep in the [….] of the midbrain. [….] projections innervate dorsal motor neurons as far as the [….] region.

Answer 3

red nucleus
contralateral
upper cervical! (not thoracic or lumbar regions)

NB: specialized for performing skilled, dextrous movements