Anatomy: Head and Neck Flashcards
layers of head and neck?
S- skin
C- CT
A- aponeurosis (galea aponurotica)
L- loose areolar layer- blood/pus collected— dangerous area of scalp–black eye
P- pericranium
ECA branches?
- 1 medial branch- Asc. pharangeal ar.— smallest branch
- 3 ant. br.- sup. thyroid ar., lingual ar., facial ar.— anesthetist art.
- 2 post. br.— post. auricular ar., occipital ar.
- 2 terminal ar.– Sf. temporal ar., Maxillary ar.=====sphenopalatine ar.– epistaxis
deep cervical fascia/ FASCIA COLLI modification in the neck?
prevertebral fascia
pre tracheal fascia
buccopharyngeal fascia– bed of tonsil
pharyngo basilar fascia— bed of tonsil
investing layer of deep cervical fascia
carotid sheath
what NOT include in carotid sheath?
external carotid ar.
angle of mandible (shaving area) is supplied by which nerve?
great auricular n.
what is frey syndrome?
nerve # to great auricular nerve and auriculotemporal nerve short circuit.
doc for trigeminal neuralgia?
carbamazepine
surgical= 90% alcohol at trigeminal nerve ganglion
best surgery for acoustic neuroma?
GAMMA KNIFE SURGERY
contents of carotid sheath?
INTERNAL JUGULAR VEIN
Common carotid ar.
internal carotid ar.
vagus nerve
ansa cervicalis ( present on ant. wall)
what is perinauds syndorme?
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
pharynx starts and ends at?
start- base of skull
end- C6 level
Common carotid ar. (CCA) can be palpable at?
CPJ (cricopharyngeal junction) at c6 level
JUST ABOVE CAROTID TUBERCLE (Chaissagnac tubercle)
larynx starts and ends at?
C3 TO C6
narrowest part of GIT?
CPJ (at c6)
Epiglottis level?
C3
Thyroid cartilage upper border level?
C3-C4
safety muscle of larynx?
post. cricoaretenoid
pituitary tumor effect on optic chiasma?
causes bitemporal hemianopia
optic nerves and their location?
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
FLOW CHART OF DURAL VENOUS SINUSSES?
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
Rupture of MMA in which h’age?
EDH– biconvex shaped
SDH- bridging veins
SAH- circle of willis #/ berry aneurysms#
ICH- HTN
strucutes passing through cavernous sinus?
Internal carotid ar.
Abducent nerve (CN6)– runs in dorello’s canal (dural tunnel)
structures related to lateral wall of cavernous sinus?
CN 3, 4, V1, V2, V3
