Medulla Anatomy

Question 1

What is contained in the descending fibers of the medial longitudinal fasciculus?

Answer 1

• medial vestibular nucleus projects to muscles of the neck

- to mediate control over position and movements of the eye relative to head position

Question 2

What sensory information is generally entering the spinal nucleus of V?

Answer 2

-pain and temperature in the face

Question 3

Where do descending fibers of V lie in relation to spinal nucleus of V?

Answer 3

Lateral

Question 4

What does the spinal nucleus of V become caudally?

Answer 4

-Substantia gelatinosa

Question 5

Do spinocerebellar fibers carry contra or ipsilateral information to the cerebellum?

Answer 5

ipsilateral

Question 6

What is the tectospinal tract?

Answer 6

• from superior colliculus of midbrain
• follows MLF to cervical level
• mediates neck postural movements (coordinates eye and neck movements)

Question 7

What is the reticular formation involved in?

Answer 7

• Sensory and motor activity
• Autonomics
• Sleep and wakefulness
• Emotions
  (i. e. pretty much everything)

Question 8

What is contained in the accessory cuneate nucleus?

Answer 8

• muscle spindles and Golgi tendon organs of upper limb

- unconscious proprioception of upper limb

Question 9

Where do fibers from the accessory cuneate nucleus project?

Answer 9

Project to inferior cerebellar peduncle as cuneocerebellar tract