Mesencephalon

Is there choroid plexus in the aqueduct of Sylvius?

no

What separates the tectum and tegmentum of the mesencephalon?

a line cutting the aqueduct of Sylvius in half

What ventricles does the aqueduct of Sylvius connect?

third and fourth ventricle

What is the function of the superior colliculus?

reflexive saccades

What is the function of the inferior colliculus?

auditory reflexes

What is the roof of the aqueduct of Sylvius?

tectum of the mesencephalon

What is the floor of the aqueduct of Sylvius?

tegmentum of mesencephalon

substantia nigra

An area of the midbrain that is involved in motor control and contains a large concentration of dopamine-producing neurons

red nucleus

A large nucleus of the midbrain that receives inputs from the cerebellum and motor cortex and sends axons to motor neurons in the spinal cord

periaqueductal gray

gray matter surrounding the cerebral aqueduct of the midbrain that is believed to play a role in the sensation of pain

superior cerebellar peduncles

fibers that connect contralateral cerebellum to the red nucleus

crus cerebri

contains a large pyramidal motor tract descending toward the spinal cord

What is the roof of the third ventricle?

fornix

Which cranial nerve nuclei are found in the somatic efferent column?

oculomotor

trochlear

abducens

hypoglossal

medial longitudinal fasciculus

Axon tract that carries excitatory projections from the abducens nucleus to the contralateral oculomotor nucleus; important in coordinating conjugate eye movements.

What type of presentation would occur if there was a lesion of the right trochlear nucleus?

left superior oblique palsy

How could an acceleration/deceleration injury cause CN IV palsy?

acceleration/deceleration could cause the tentorium cerebelli to compress or cut CN IV