Caudal Medulla

Question 1

Nucleus Gracilis

Answer 1

• Well localized touch, pressure & vibratory sense (contralateral)
• Caudal medulla

Question 2

Fasiculus cuneatus

Answer 2

Well localized touch, pressure & vibratory sense (contralateral)
- Caudal medulla

Question 3

Nucleus cuneatus

Answer 3

Well localized touch, pressure & vibratory sense (contralateral)
- Caudal medulla

Question 4

Spinal tract of trigeminal

Answer 4

• Pain & temperature information sensory fibers from CN V

- Runs through the caudal medulla

Question 5

Spinal nucleus of trigeminal

Answer 5

• Pain & tempreture information for CN V (termination)

- Lateral brainstem

Question 6

Internal arcuate fibers

Answer 6

• Nerve fibers from cuneate\gracilis nuclei (well localized touch, pressure & vibration
• Distinctive feature of the caudal to mid-medulla

Question 7

Anterolateral system

Answer 7

• Pain, tempreture & crude touch
• Three ascending pathways
  
  1. Spinothalamic tracts
  2. Spinoreticulotract
  3. Spinotectal tracts

Question 8

Medullary Pyramid

Answer 8

• Skilled Motor movements of the contralateral limb

- Vental medulla, containing decussated fibers from the corticospinal tract

Question 9

Medial Lemniscus

Answer 9

• Well localized touch vibration & joint sensation
• Connection between dorsal column nuclei (cuneate & fasiculus) and the thalamus
• Run through the arcuate fibers

Question 10

Medial Longitudinal Fasciulus

Answer 10

• Horizontal eye movements

- In the midline, ventral to the ventricle sysytem

Question 11

Central canal

Answer 11

• Connects 4th ventrical with the spinal cord

- Obex of the medulla

Question 12

Central Gray mater or Periaquaductal gray

Answer 12

• Opiate neurons that activate descending pain supression pathways
• Surrounds cerebral aquaduct