1) The median and lateral apertures are the connection between the A. right and

Question

1) The median and lateral apertures are the connection between the

A. right and left cerebral hemispheres

B. right and left cerebellar hemispheres

C. fourth ventricle and subarachnoid space

D. third and fourth ventricles

E. lateral ventricles and third ventricle

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2) Neurons from proprioceptors relay messages to the cerebellum y way of

A. inferior olivary nucleus

B. inferior cerebellar penduncles

C. middle cerebellarpenduncles

D. lateral geniculate nucleus

E. All are correct

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3) Most all sensory information synapses in the _________ and is relayed to the cerebral cortex

A. medulla oblongata

B. pons

C. basal ganglia

D. thalamus

E. hypothalamus

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4) The left side of the cerebrum controls skeletal muscles on the right side of the body because motor neurons cross from left to right in the

A. precentral gyrus

B. cerebellum

C. medulla oblongata

D. hypothalamus

E. thalamus

Explanation / Answer

1. C

Median and lateral apertures are also known as foramen Magendie and Luschka respectively. These are openings in the 4th ventricle provide a conduit for CSF to flow from the brains ventricular system into the subarachnoid spaces.

2. A

Inferior olivary nucleus is a part of the olivocerebellar system and is mainly involved in cerebellar motor learning and function.

3. D

Nearly all sensory information synapses in the thalamus and is relayed to the cerebral cortex.

4. C

Majority of motor neurons ( corticospinal tracts cross over in the medulla oblongata, resulting in muscle being controlled by the opposite side of the brain.

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