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Neuroscience Exam 3
Tracts 1 - Corticospinal Tract
13
Anatomy
Graduate
03/07/2016

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Cards

Term
Corticospinal tract is what kind of tract?
Definition
descending motor tract
Term
Descending tracts take what kind of info from the CNS to where?
Definition
take efferent info from CNS to periphery
Term
Motor tracts control what?
Definition
movements
Term
Descending motor tracts are classified into what 2 systems?
Definition
Pyramidal system and extrapyramidal system
Term
The pyramid system carries signals that generate what movements?
Definition
variable voluntary skeletal muscle movements
Term
The extrapyramidal system carries signals that generate what movement?
Definition
stereotypic movements (reflexes, posture, locomotion)
Term
The extrapyramidal system carries signals that modulate what movements?
Definition
Voluntary movements
Term
What are the 2 tracts of the pyramidal system?
Definition
Corticospinal tract and corticonuclear tract
Term
The main component of the corticospinal tract is what?
Definition
lateral corticospinal tract
Term
What does the lateral corticospinal tract connect?
Definition
connects the lower end of the medulla to the ventral horn
Term
Corticonuclear tract connects to what?
Definition
connects to cranial nerve motor nuclei in the brainstem
Term
What motor neurons do the corticopinal tract consist of?
Definition
upper motor neurons
Term
Lower motor neurons convey siganls from where to where?
Definition
corticospinal tract to skeletal muscles
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