Anatomy: Head and Neck

Question 1

layers of head and neck?

Answer 1

S- skin
C- CT
A- aponeurosis (galea aponurotica)

L- loose areolar layer- blood/pus collected— dangerous area of scalp–black eye

P- pericranium

Question 2

ECA branches?

Answer 2

1. 1 medial branch- Asc. pharangeal ar.— smallest branch
2. 3 ant. br.- sup. thyroid ar., lingual ar., facial ar.— anesthetist art.
3. 2 post. br.— post. auricular ar., occipital ar.
4. 2 terminal ar.– Sf. temporal ar., Maxillary ar.=====sphenopalatine ar.– epistaxis

Question 3

deep cervical fascia/ FASCIA COLLI modification in the neck?

Answer 3

prevertebral fascia

pre tracheal fascia

buccopharyngeal fascia– bed of tonsil

pharyngo basilar fascia— bed of tonsil

investing layer of deep cervical fascia

carotid sheath

Question 4

what NOT include in carotid sheath?

Answer 4

external carotid ar.

Question 5

angle of mandible (shaving area) is supplied by which nerve?

Answer 5

great auricular n.

Question 6

what is frey syndrome?

Answer 6

nerve # to great auricular nerve and auriculotemporal nerve short circuit.

Question 7

doc for trigeminal neuralgia?

Answer 7

carbamazepine

surgical= 90% alcohol at trigeminal nerve ganglion

Question 8

best surgery for acoustic neuroma?

Answer 8

GAMMA KNIFE SURGERY

Question 9

contents of carotid sheath?

Answer 9

INTERNAL JUGULAR VEIN
Common carotid ar.
internal carotid ar.
vagus nerve
ansa cervicalis ( present on ant. wall)

Question 10

what is perinauds syndorme?

Answer 10

compression of interior nucleus of cajal in sup. colliculi due to pineal gland tumor —- resulting in loss of upward gaze—- also k/a sunset sign

Question 11

pharynx starts and ends at?

Answer 11

start- base of skull
end- C6 level

Question 12

Common carotid ar. (CCA) can be palpable at?

Answer 12

CPJ (cricopharyngeal junction) at c6 level

JUST ABOVE CAROTID TUBERCLE (Chaissagnac tubercle)

Question 13

larynx starts and ends at?

Answer 13

C3 TO C6

Question 14

narrowest part of GIT?

Answer 14

CPJ (at c6)

Question 15

Epiglottis level?

Answer 15

C3

Question 16

Thyroid cartilage upper border level?

Answer 16

C3-C4

Question 17

safety muscle of larynx?

Answer 17

post. cricoaretenoid

Question 18

pituitary tumor effect on optic chiasma?

Answer 18

causes bitemporal hemianopia

Question 19

optic nerves and their location?

Answer 19

CN1- cribiform plate of ethmoid

CN2- optic canal

CN 3,4,V1, 6- sup. orbital fissure

CN V2– foramen rotundum

CN V3– Foramen ovale—-MALE
M- MANDIBULAR N.
A- ACC. MENINGEAL AR. (AMA)
L- LESSER PETROSAL N.
E- EMISSARY VEIN

Formaen spinosum– MEN
M- MMA (middle mening. ar.)
E- Emissary vein
N- Nervous spinosum (meningeal branch of mandibular n.)

CN 7, 8– INTERNAL ACOUSTIC MEATUS

CN 9,10,11- JUGULAR FORAMEN

NOTE- CN9 has seperate dural sheath—PYQ

CN 12- HYPOGLOSSAL CANAL

Question 20

FLOW CHART OF DURAL VENOUS SINUSSES?

Answer 20

Superior saggital sinus > Torcula herophilli > right transverse sinus > Rt. sigmoid sinus > Rt. IJV

Inf. saggital sinus + Great cerebral vein of Galen= Straight sinus > Torcula herophilli > Left trans. sinus > left sigmoid sinus> Lt. IJV

Structures that arive at Torcula herophilli- TOSS

Question 21

Rupture of MMA in which h’age?

Answer 21

EDH– biconvex shaped

SDH- bridging veins
SAH- circle of willis #/ berry aneurysms#
ICH- HTN

Question 22

strucutes passing through cavernous sinus?

Answer 22

Internal carotid ar.

Abducent nerve (CN6)– runs in dorello’s canal (dural tunnel)

Question 23

structures related to lateral wall of cavernous sinus?

Answer 23

CN 3, 4, V1, V2, V3