Another nerve enters deep in the buccal
area where the buccal branches of the
facial nerve are found but it is a purely
sensory branch of the mandibular
branch of Cranial Nerve V (Trigeminal).
It supplies the mucous membrane inside
the cheek and to the skin in this area.
The parotid duct (white) can be seen
crossing the masseter muscle on it way
to penetrate the buccinator muscle. It
opens into the mouth opposite the upper
2nd molar tooth called stensons duct. It
forms a small swelling (papilla) inside
the oral cavity that can be easily seen.
The partotid gland is one of three major
salivary glands in the head and neck.
V1, V2, V3 = DIVISIONS
The arterial and venous supply to
the face is seen in the diagram. They
are the:
•
Facial artery
o
Inferior labial
o
Superior labial
o
Angular
•
Facial vein
•
Superficial temporal artery
•
Superficial temporal vein
The facial vein is important
clinically because it has a direct
connection to the ophthalmic vein
and then to a deep venous sinus
within the cranial cavity, the
cavernous sinus. Bacteria can enter
the facial vein and gain access to
internal cranial structures.
The arterial and
venous supply to the
face
Inspect and palpate the eye. A few
anatomical landmarks that can be seen:
•
Palpebral commissures
•
Medial & Lateral angles
called canthus (7,8)
•
Cornea
•
Sclera (3)
•
Iris (2)
•
Pupil (1)
•
Lacrimal caruncle (4)
•
Lacrimal punctum (5)
•
Openings of tarsal glands (6)
•
Eyelashes
•
Eyebrows
Sensory Nerves of the Face
The sensory nerves of the face are
terminal branches of the three
divisions of the trigeminal nerve
(Cranial nerve V-5):
Opthalmic division (V1)
•
Lacrimal
•
Supraorbital
•
Supratrochlear
•
Infratrochlear
•
External nasal
Maxillary division (V2)
•
Infraorbital
•
Zygomaticofacial
Mandibular division (V3)
•
Buccal
•
Mental
• The sensory nerves of the face enter the face through a
series of foramina:
• 1. Supraorbital foramen (supraorbital nerve & vessels).
Deep to frontalis m.
• 2. Infraorbital foramen (infraorbital nerve & vessels).
Deep to levator labii superioris m.
• 3. Mental foramen (mental nerve & vessels) deep to the
platysma m.
• 4. Zygomaticofacial foramen (zygomaticofacial nerve).
Littles area of face/Danger area of face
BLOOD SUPPLY AND NERVE
SUPPLY FOR SCALP