#09

Question 1

t neural crest cells give rise to many specialized structures in the peripheral
anatomy, including most sensory neurons. In the developing cranium, however, neural
crest does NOT give rise to sensory neurons associated with a. Rather, a
small population of ectodermal precursor cells called b does the job.

Answer 1

cranial nerves
neurogenic placodes

Question 2

Placodes are embryonic structures that give rise to structures such as

Answer 2

hair follicles,
feathers, and teeth.

Question 3

Neurogenic placodes are regions of a just lateral to the neural plate (NP) – they are not part of the neural tube – that delaminate
to give rise to neurons and glia of the cranial sensory ganglia.

Answer 3

a: thickened ectoderm

Question 4

After neurulation, the neural tube bends at characteristic places called a, and it expands to form characteristic swellings called b

Answer 4

flexures
vesicles

Question 5

prosencephalon

Answer 5

telencephalon and diencephalon

Question 6

mesencephalon

Answer 6

mesencephalon (midbrain, cerebral aqueduct)

Question 7

rhombencephalon

Answer 7

metencephalon myelencephalon

Question 8

If IVth ventricle is present at the level of question (pond and upper half medulla), all other brainstem neurons of every other type are found within the long circuferential arterial territory at their respective levels, either a or b

Answer 8

PICA AICA

Question 9

GSE cranial nerves

Answer 9

3 (higher half midbrain), 4,(lower half midbrain) 6 (lower half pons),12 (medulla)

Question 10

SVE cranial nerves

Answer 10

Nothing in the midbrain
5 (upper pons) ,7(lower pons), 9 (upper medulla),, 10(upper medulla), 11 (lower medulla)

Question 11

Midbrain disease

Answer 11

eye related problems

Question 12

Problem with facial nucleus (VII)

Answer 12

you cannot blink which can lead to blindness, can move the face either

Question 13

GVE cranial nerves

Answer 13

10 (medulla), Superior (VII) andd inferior (IX) salvatory nuclei to moisturize the face (lower half of pons), EW nucleus (III) midbrain- construction of pupil

Question 14

Nucleus tractud solitarii (NTS)

Answer 14

Receives all GVA and SVA terminations from CNs VII, IX, X (from medulla to the alf of pons)

Question 15

symphatatics always a the muscles

Answer 15

constrict

Question 16

AICA PICA SCA damages

Answer 16

Cerebellum problems

Question 17

herniation happens first at the

Answer 17

uncus

Question 18

Trigeminal sesory complex (GSA)

Answer 18

Spinal nucleus of V in Medulla (2nd order pain and temp), main sensory nucleus of V (2nd order discriminative touch neurons)- mid pons, mesencephalic nucleus (1st order proprioception)- midbrain, jaw joint position monitoring

Termination site of ALL GSA AFFERENTS in CNs V, VII, IX, X

Question 19

Vestibulocochlear nuclei (SSA)

Answer 19

Uper medulla- lower pons
2 cochlear nuclei (2 medulla) and 4 vestibular nuclei (2 medulla 2 pons)