TSM 1.8 Flashcards
what are upper motor neurones?
- neurones in cerebral cortex - project to lower motor neurones
what are direct pathway of upper motor neurones?
- corticospinal tract - corticobulbar tract
what are indirect pathway of upper motor neurones?
- from brainstem nuclei to lower motor neurones
what does lateral corticospinal tract do?
voluntary control of distal musculature
what does anterior corticospinal tract do?
voluntary control of proximal musculature
what does the reticulospinal tracts do?
- flexor reflexes - initiate patterned activity
What does tectospinal do?
- controls neck movement - orientation to visual stimuli
What does lateral vestibulospinal tract do?
- control antigravity muscles
What does medial vestibulospinal tract do?
Regulates head movements
Which tract takes up large part of internal capsule?
Corticospinal tract
which tract (blue) is this?
tectospinal
which tract (red) is this?
rubrospinal
which tract (blue) is this?
lateral (medullary) reticulospinal tract
which tract (green) is this?
medial (pontine) reticulospinal tract
which tract (red) is this?
vestibulospinal tract
what is the motor and sensory loss during lesion in lateral convexity of cortex?
motor: paralysis of contralateral face
sensory: loss of sensation in contralateral face
what is the sensory and motor loss during lesion in medial cortex?
motor: paralysis of contralateral leg
sensory: loss of sensation in contralateral leg
what is the motor and sensory loss during lesion at genu of internal capsule?
motor: paralysis of contralateral lower face
sensory: loss of sensation in contralateral face
what is the motor and sensory loss during lesion in posterior limb of internal capsule?
motor: paralysis of contralateral lower leg
sensory: loss of sensation of contralateral lower leg
what is the motor loss during lesion in midbrain cerebral peduncle?
paralysis of contralateral of leg, arm, tongue, lower face and ipsilateral eye
what is the motor loss during lesion in pontine base?
paralysis of contralateral leg, arm, tongue, ipsilateral eye
what is the motor and sensory loss during lesion in medial medulla?
motor: paralysis of contralateral leg, arm and ipsilateral tongue
sensory: loss of sensation in contralateral body
what is the motor loss during lesion of spinal cord?
spastic paralysis of ipsilateral body below the lesion
flaccid paralysis of ipsilateral body at level of lesion
what is the sensory loss for lesion at the spinal cord?
loss of touch, vibration and proprioception at ipsilateral side below lesion
loss of pain and temperature in contralateral below lesion
which lesion causes decorticate position?
above red nucleus, thalamus and
which lesion causes decerebrate position?
below the red nucleus
