Chapter 14: Motor System 4: Motor Cortex
Speech Language Hearing Science Sl 459 with Kahn at Northern Michigan University
About this deck
By: Breanna St.Onge
Textbook:
Neuroscience for the Study of Communicative Disorders (Point (Lippincott Williams & Wilkins))
Created: 2011-11-05
Size: 14 flashcards
Views: 5
Textbook:
Neuroscience for the Study of Communicative Disorders (Point (Lippincott Williams & Wilkins))Created: 2011-11-05
Size: 14 flashcards
Views: 5
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alternating hemiplegia
Brainstem lesion characterized by cranial nerve impairments on the side ipsilateral to the lesion and hemiplegia and sensory loss on the opposite side.
Babinski reflex
Dorsal flexion of the great toe and fanning of other toes on being stroked on the sole of the foot. Indicating pyramidal tract (upper motor neuron) pathology in adults. Named after French neurologist Joseph Babinski.
corticobulbar tract
fibers: Short axonal projections descending from the motor cortex and synapsing on the brainstem motor cranial nerve nuclei. This tract serves motor speech functions by innervating the musculature of the face, tongue, and jaws.
corticospinal tract
fibers: Long axonal projections fivers, also called pyramidal fibers, originating in the motor cortex and descending to terminate on spinal motor nuclei. This tract regulates the motor control of skeletal muscles.
cremasteric reflex
Retraction of the testicle on stroking the skin of the inner thigh. Absence of this reflex indicates a pyramidal tract lesion (upper motor neuron)
homunculus
Representation of the body in the sensorimotor cortex.
postcentral gyrus
(somesthetic cortex or primary sensory cortex) Cortical region (Brodmann area 3,1,2) behind the central sulcus that integrates sensory inputs from the body and provides sensory awareness.
precentral gyrus
Primary motor cortex (Brodmann area 4), located rostral to the central sulcus.
premotor cortex
Area located anterior to the motor cortex that programs and regulates skilled movements.
pyramidal decussation
Crossing of motor fibers that takes place in the most caudal medulla and accounts for contralateral motor organization.
pyramidal tract
The motor fibers of the corticospinal tract named because of their location in the medullary pyramids.
spastic hemiplegia
Paralysis of one side of the body after a lesion in the pyramidal tract.
supplementary motor cortex
Midsagitally located extension of the premotor cortex, which is involved with bilateral aspects of motor pattern control and planning.
upper motor neurons
Cell bodies in the motor cortex and their descending axonal processes that synapse on the cranial and spinal motor neurons.
About this deck
By: Breanna St.Onge
Textbook: Neuroscience for the Study of Communicative Disorders (Point (Lippincott Williams & Wilkins))
Created: 2011-11-05
Size: 14 flashcards
Views: 5
Textbook:
Neuroscience for the Study of Communicative Disorders (Point (Lippincott Williams & Wilkins))Created: 2011-11-05
Size: 14 flashcards
Views: 5
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
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“I have been getting MUCH better grades on all my tests for school. Flash cards, notes, and quizzes are great on here. Thanks!”
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