S3: Pyramidal system

Question 1

The cortico-bulbar tract descends through the brainstem and controls neurons of

Answer 1

all of the cranial nerve nuclei

Question 2

corticobulbar tract controls cranial nerve nuceli on which side of the body

Answer 2

Cortical control over the Cranial N. nuclei is predominantly bilateral

Control to the Hypoglossal Nucleus is predominantly contralateral

Control to the Facial Nucleus is… BOTH…

Question 3

The cortico-pontine tract descends to terminate on the _____

Answer 3

pontine nuclei in the basis of the pons.

Question 4

Axons from the corticopontine nuclei forward the signals to the cerebellum on the ___ side.

Answer 4

side

Question 5

what is the course of the cortico-rubro-olivary circuit)

Answer 5

cortex –> red nucleus —> inferior olive —> cerebellum

Question 6

what does the corticospinal tract control?

Answer 6

motor neurons of the trunk and limbs

Question 7

In the brainstem lateral corticospinal axons descend on the same side as their cortical origin until the

Answer 7

pyradmial decussation in the caudal medulla

Question 8

which corticospinal tract continues ipsilaterally?

Answer 8

anterior corticospinal tract (only 15%)

Question 9

brainstem-spinal pathways collectively control

Answer 9

themuscles of the neck, trunk, and limbs

Question 10

damage to a Brainstem-spinal pathways at the level of the medulla wiill cause

Answer 10

problems with movement on the opposite side of the body

Question 11

damage to a Brainstem-spinal pathways at the level of the spinal caord wiill cause

Answer 11

problems with mvoement on the same side of the body