Ch1 Flashcards
(31 cards)
Branches of external carotid behind ear
- post auricular
- occipital
Arteries related to digastric
Occipital artery: passes along the lower border of posterior belly of the digastric muscle.
Posterior auricular artery: passes along the upper border of posterior belly of digastric muscle.
Blood supply for facial N
Posterior auricular gives stylomastoid artery which supplies the facial nerve in the facial canal.
What area of scalp is blood supplied by supra t and supra orbital
Forehead and far back as the vertix
Occipital vein drains into …
Suboccipital plexus
Nerve supply to scalp in front of the ear
- Supratrochlear
nerve:
from
ophthalmic nerve to the forehead. 2. Supraorbital nerve: from the ophthalmic nerve to the scalp till the
vertex (highest point of skull).. 3. Zygomaticotemporal nerve: from the
maxillary nerve to the temporal region.
4. Auriculotemporal nerve: from the mandibular nerve to the temporal region
N supply to scalp behind ear
Great auricular nerve (C2, 3): to the skin of the angle of the mandible, lower half of
DR
the auricle and the scalp.
Lesser occipital nerve( v of c2) to the scalp and upper half of the auricle (inner surface).
3 Greater occipital nerve (dorsal ramus of c2 ) scalp till vertix
43rd occipital nerve (dorsal ramus of C3): to skin over external occipital protuberance.
LYMPH DRAINAGE OF THE FACE
By 3 groups of lymph nodes:
- Submental nodes:
Drain the chin and the central part of the lower lip.
- Preauricular (parotid) nodes:
Drain the lateral half of the eyelids & lateral part of the face.
- Submandibular nodes:
Drain the medial half of the eyelids and remaining parts of the face.
Buccinator origin and insertion
:
Origin:
- Upper fibers:
From the maxilla above the 3 molar teeth.
- Lower fibers:
From the mandible below the 3 molar teeth.
- Middle fibers:
From the pterygomandibular ligament which extends from the pterygoid hamulus superiorly to mylohyoid line of the mandible inferiorly.
Insertion:
- Upper fibers: into the upper lip.
- Lower fibers: into the lower lip.
- Middle fibers: cross at the corner of the mouth so that upper fibers enter the lower lip and lower fibers enter the upper lip.
Orbicularis oris origin insertion and action
: consists of fibers that completely encircle the mouth (oral sphincter)
Origin: from the maxilla, the mandible and from the buccinator muscles Insertion: into the skin and mucous membrane of the lips.
Action: it closes the lips and is used during whistling.
Ear n supply
G auricular
Lower half
L occ.
Upper and internal
Auriculo temporal
Ext auditory meatus
Eyelid n supply
Upper
- supra troclear
- – sup orbital
- —-palpebral of lacrimal of ophthalmic
Lower
– palpepral of infraorbital
Nose skin n supply
- lateral
From infraorbital
Dorsal
- upper from infratrochlear of nasociliary
- lower from ext nasal
Cheek n supply
- over zygo ..zygomatico facial - over buccinator .. buccal of mandibular - also infra orbital
Temple n supply
In front of ear post to ant
- auriculo temporal
- zygomatico temporal
- lesser occipital behind ear
Facial nerve 7 branches
Branches of the extracranial part:
A. At the stylomastoid foramen: 2 branches:
Branches of the Facial Nerve
- Posterior auricular nerve: to occipital belly of the occipitofrontalis and the posterior auricular muscle. 2. Nerve to digastric: to the posterior belly of the digastric and stylohyoid muscles.
B. Inside the parotid gland: 5 terminal branches:
- Temporal branch: to frontal belly of occipito
frontalis and anterior & superior auricular muscles. 2. Zygomatic branch: to the orbicularis oculi.
- Buccal branch: to the buccinator muscle.
- Mandibular branch: to muscles of the lower lip.
- Cervical branch: to the platysma.
Foramen of f nerve
Stylomastoid foramen
Facial artery arises where
Above lingual
Relation of facial artery and vein
Artery is ant to vein
Anastomosis of facial artery
- angular with branches of ophthalmic
- labial (sup labial) with each other providing connections between both ext carotid in both sides
Branches of facial artery
- angular
- lateral nasal
- inf labial artery
- sup labial with its Septal branch
Branches of sup temporal A
Transverse facial artery
2: Zygomatico-orbital artery)
3: Middle temporal artey
4: Anterior auricular artery
Sa: Anterior terminal branch 5b. Posterior terminal branch
2 terminal branches of external carotid
Max A
Sup Temporal A
Transverse facial A course
below the zygomatic arch and above the parotid duct.
