Motor Exam Flashcards
What corticospinal tract decussates in the medullary pyramids and descend in the posterior lateral white columns?
Lateral corticospinal tract
What corticospinal tract does NOT decussate in the medullary pyramids and descend in the anterior white columns?
Anterior corticospinal tract
What tract descends to the spinal cord, where it facilitates ipsilateral extensor muscle tone of the trunk and limbs and does NOT have cell bodies in the cortex?
Lateral vestibulospinal tract
What tract arises from the superior colliculus, crosses in the dorsal segmental decussation, and descends to influence muscles of the neck and upper back to move the head in response to external stimuli and to maintain head position in relation to body position?
Tectospinal tract
What tract arises from the oral and caudal pontine reticular nuclei and facilitates extensor muscles, especially of the trunk and proximal limbs?
Medial reticulospinal tract
What tract arises from the gigantocellular reticular nucleus and is primarily uncrossed but with a small crossed component?
Lateral reticulospinal tract
What part of the cerebellum has more to do with the lower extremities?
Anterior
What part of the cerebellum influences muscle in midline?
Midline cerebellum
What controls movements on the right side of the body?
Left cerebral
Right cerebellar
What lesion is the cause of Hyperreflexia, Hypertonia in flexors of upper limb, extensors of lower limb, and clonus?
UMN lesion in Cortex
What lesion is the cause of Hyporeflexia, Hypertonia in all muscles, and rigidity?
UMN lesion in Brainstem
Where are LMN cell bodies located?
Ventral Horn
What lesion is the cause of Hyporeflexia, hypotonia, atrophy, and twitches (fasciculations)?
LMN lesion
What do Gamma motor neurons of LMN excite?
Intrafusal muscle fibers of the muscle spindles
What tract are gamma motor neurons controlled by?
The reticulospinal tract
