Mesencefal

Question 1

What are the 2 craneal nerves that arise from the midbrain(mesencefal)

Answer 1

Oculomotor (III)
Troclear (IV)

Question 2

Medial 1/5 of the peduncles contains

Answer 2

Corticospinal fibres (frontospinal)

Question 3

Lateral 1/5 of the peducles contains

Answer 3

1. Parietopontines
2. Occipitopontines
3. Temporopontines

Question 4

Middle 3/5th of the puduncles contain

Answer 4

corticoespinales(via piramidal)
corticonucleares

Question 5

Via directa of the nucli vermell

Answer 5

Fibres Corticoespinals

Question 6

Via indirecta del nucli vermell

Answer 6

Fibres corticorubrals

Question 7

Where does the Corticospinal fibre decussate ?

Answer 7

pyramidal bulbars

Question 8

Which fibres/tracts originate from the nucli vermell and are they homo or contralateral

Answer 8

The rubro-espinal, contralaterals. They originate from the corticorubral fibre.

Question 9

Which fibres that pass through the nucli vermell decussate?

Answer 9

Pudencle cerebeloso superior(pero doble depues de n. vermell) y rubroespinal

Question 10

Afferences and efferences of the n. vermell

Answer 10

Afferences:
1. Corticorubral HL
2. Peduncles cerebe sup. CL(doble)
Efferences:
1. Rubroespinal CL

Question 11

What can u find on a traverse cut of the midbrain at the inferior level that you cant find on the superior level

Answer 11

16- Decussació dels peduncles cerebel.sup
17- Origen real: nucli del n.IV (nervi troclear)
18- Nervi troclear (n.IV)
19- Nucli del col.licle inferior - audicio
20- Nucli mesencefàlic del n.trigèmin (n.V)

Question 12

What can u find on a traverse cut of the midbrain at the superior level that you cant find on the inferior level

Answer 12

1. origin of the oculomotor(III) nerve
2. the oculomotor nerve
3. nucli. de colliculo sup (vision)

Question 13

Descussacion Tegnmental Dorsal

Answer 13

TECTO ESPINALS (Colliculos superiors)

Question 14

Descussacion Tegmental ventral

Answer 14

N. Vermell