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chapter 14
brain control of movement
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Undergraduate 4
11/20/2010

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Term
lateral pathway
Definition
axons in the lateral column of the spinal cord that are involved in the control of voluntary movements of the distal musculature and are under direct cortical control
Term
ventromedial pathway
Definition
axons in the ventromedial column of the spinal cord that are involved in the control of posture and locomotion and are under brain stem control
Term
corticospinal tract
Definition
the tract that originates in the neocortex and terminates in the spinal cord; involved in the control of volunutary movement
Term
motor cortex
Definition
cortical areas 4 and 6, which are directly involved in the control of voluntary movement
Term
pyramidal tract
Definition
a tract running along the ventral medulla that carries corticospinal axons
Term
rubrospinal tract
Definition
a tract originating in the red nucleus and terminating in the spinal cord; involved in the control of movement
Term
red nucleus
Definition
a cell group in the midbrain involved in the control of movement
Term
vestibulospinal tract
Definition
a tract originating in the vestibular nuceli of the medulla and terminating in the spinal cord; involed in the control of movement and posture
Term
tectospinal tract
Definition
a tract originating in the superior colliculus and terminating in the spinal cord; involved in the control of head and neck movement
Term
reticular formation
Definition
a region of the brain stem ventral to the cerebral aqueduct and fourth ventricle; involved in many funtions, including the control of posture and locomotion
Term
pontine reticulospinal tract
Definition
a tract originating in the pontine reticluar formation and terminating in the spinal cord, involved in the control of movement
Term
medullary reticulospinal tract
Definition
a tract originating in the medullary reticular formation and terminating in the spinal cord; involved in the control of movement
Term
primary motor cortex (M1)
Definition
Brodmann's area 4, located on the precentral gyrus; the region of cortex that, when weakly stimulated, elicits localized muscle contractions
Term
premotor area (PMA)
Definition
the lateral part of the cortical area 6, involved in the control of voluntary movement
Term
supplementary motor area (SMA)
Definition
the medial part of cortical area 6; involved in the control of voluntary movement
Term
ventral lateral (VL) nucleus
Definition
a nucleus of the thalamus that relays information from the basal ganglia and cerebellum to the motor cortex
Term
basal ganglia
Definition
a collection of associated cell groups in the basal forebrain, including the caudate nucleus, putamen, globus pallidus and subthalamus
Term
caudate nucleus
Definition
a part of the basal ganglia in the basal forebrain, involved in motor control
Term
putamen
Definition
a part of the basal ganglia in the basal forebrain, involved in motor control
Term
globus pallidus
Definition
a part of the basal ganglia in the basal forebrain; invlovled in motor control
Term
subthalamic nucleus
Definition
a part of the basal ganglia in the basal forebrian; invlovled in motor control
Term
substantia nigra
Definition
a cell group in the midbrain that uses dopamine as a neurotranmitter and innervates the striatum
Term
striatum
Definition
a collective term for the caudate nucleus and putamen; involved in the initiation of willed movements of the body; plays a role in procedural memory
Term
Parkinson's disease
Definition
a movement disorder caused by damage to the substantia nigra, characterized by paucity of movement, difficulty in intitiating willed movement and resting tremor
Term
Huntingtion's disease
Definition
a hereditary, progressive, inevitably fatal condition characterized by dyskinesias, dementia, and personality disorders; associated with profound degeneration of neurons in the basal ganglia and cerebral cortex
Term
ballism
Definition
a movement disorder caused by damage to the subthalamus, characterized by violent, flinging movemnts of the extremities
Term
motor strip
Definition
a name for area 4 on the precentral gyrus; also called primary motor cortex
Term
cerebellum
Definition
a structure derived from the rhombencephalon, attached to the brain stem at the pons; an important movement control center
Term
ataxia
Definition
abnormally uncoordinated and inaccurate movements, often associated with cerebellar dysfunction
Term
vermis
Definition
the midline region of the cerebellum
Term
cerebellar hemispheres
Definition
the lateral regions of the cerebellum
Term
pontine nuclei
Definition
the clusters of neurons that relay information from the cerebral cortex to the cerebellar cortex
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