Descending tracts Flashcards
Where do the pyramidal tracts originate?
the cerebral cortex
Where do the pyramidal tracts get their name from?
the medullary pyramids
What are the two subdivisions of the pyramidal tracts?
coricospinal
corticobulbar
What does the corticospinal tract supply?
musculature of the body
What does the corticobulbar tract supply?
musculature of the head and neck
What percentage of fibres of the corticospinal tract decussate at the base of the pyramids?
90%
Which corticospinal tract do the fibres that decussate at the pyramids form?
the lateral corticospinal tract
Where do the fibres of the anterior corticospinal tract decussate ?
the spinal cord
Where do fibres of the corticospinal tract terminate ?
the ventral horn
Where do the fibres of the corticobulbar tracts arise from?
the lateral aspect of the primary motor cortex
Where do fibres of the corticobulbar tracts terminate ?
on the motor nuclei of the cranial nerves
What tract originates at the red nucleus?
rubrospinal tract
Which tract coordinates movements of the head in relation to vision stimuli?
tectospinal tract
Which tract conveys balance information to the spinal cord? The information remains ipsilateral.
vestibulospinal tract
Which tract arises from the pons, fascilitates voluntary movements and increases muscle tone?
medial reticulospinal tracts
