3 - Motor Systems II Flashcards
What does the frontal lobe control?
Motor control
What area is the primary motor cortex
4
Local lesions in primary motor cortex
Paralysis of specific muscle groups
What area is the premotor cortex
6
What area is the supplementary motor cortex
8
Damage to premotor/supplementary motor cortex
Apraxia - normal refelxes but difficulty in complex motor tasks
What is Oculomotor Apraxia
difficulty moving eyes horizontally and quickly
caused by damage to frontal eye fields
Frontal eye fields function
motor control of extraocular eye muscles
Damage to brocas area
Motor aphasia - difficulty constructing meaningful word sentences
What areas are the dorsolateral prefrontal cortex
9 and 10
What is the function of the dorsolateral prefrontal cortex
Planning and movement
Lesion in the dorsolateral prefrontal cortex
Personality changes
lack of ability to plan or sequence actions or tasks
Test for frontal lobe function
Wisconsin Card Sorting Test
What area is the orbitofrontal cortex
11
Function of the orbitofrontal cortex
Inhibition of motor responses associated with the lmbic system
Lesion in orbitofrontal cortex
Impulsiveness
Sexual disinhibition
Lack of concern
Stroke in motor thalamus
Severe paralysis
Occlusion of the MCA
all of one side of the frontal lobe
Severe motor disability in all parts of the contralateral body except the lower limb
Blood supply to basal ganglia
MCA via leticulostriate arteries
What does the cortcobulbospinal tract run through
Internal capsule
Where does the corticobulbar component terminate
Pontine nuclei
Reticular formation
Red nucleus
CN nuclei
Where is the red nuclei
Midbrain
Where is the motor decussation of the corticobulbospinal tract
Upper Spinal Cord + Medullary Pyramids
Origin of lateral vestibulospinal tract
Vestibular nuclei in upper medulla/lower pons
