Face And Scalp Flashcards
The scalp consists of ____ layers.
Which layers are intimately bound together?
5
First 3
Layers of the scalp..
SCALP
S- Skin
C- Connective Tissue
A- Aponeurosis
L- Loose areoles connective tissue
P - Pericranium
Thick layer of the scalp, with hair and sebaceous glands
Skin
Fibrous layer of the scalp, with fatty connective tissue with septa that connect the skin to the Aponeurosis
Connective tissues
a thin tendinous sheet that connects the bellies of the occipitofronalis
Also known as Epicranial
Aponeurosis
Located in the subaponeurotic space
Loose Areolar connective tissue
The periosteum covering the outer surface of the skull bones
Pericranium
The muscle of the Scalp
Occipitofronalis muscle
The two parts of the Occipitofronalis muscle
Occipital belly and frontal belly
Originates from the unchallenged line of the occipital bone and inserts into the Epicranial Aponeurosis
Occipital belly
Originates from the skin and superficial fascia of the eyebrow area and inserts into the Epicranial Aponeurosis
Frontal belly
Action of the Occipitofronalis muscle
To move the scalp on the skull and raise the eyebrows
What innervates the Occipitofronalis muscle?
The facial nerve
Where are the sensory nerves located?
In the superficial fascia
What are the 6 sensory nerves of the scalp?
Supratrochlear nerve, supraorbital nerve, zygomaticotemporal nerve, auriculotemporal nerve, lesser occiptal nerve, greater occipital nerve
Branches of the trigeminal nerve
Sensory
Supratrochlear and supraorbital (ophthalmic division)
zygomaticotemporal (maxillary)
Auriculotemporal (mandibular)
Where does the lesser occipital nerve branch from?
Branch of the cervical plexus (C2)
Where does greater occipital nerve branch from?
branch of the dorsal Ramus of C2
Why do cuts in the scalp bleed profusely?
The scalp has an extensive blood supply
Arteries of the Scalp
Supratrochlear, supraorbital, superficial temporal, posterior auricular, occiptal
Supra trachea vein and supraorbital veins unite to form the
Facial vein
Superficial temporal vein unites with the maxillary vein to form the
Retromandibular vein
The posterior auricular vein unites with the posterior division of the retromandibular vein to form the
External jugular vein
The _____________ drains into the suboccipital venous plexus, which in turn drains into the vertebral veins or the internal jugular vein
Occipital vein
What do emissary veins do?
Connect the veins of the scalp with the diploic veins of the skull bone, and with the intracranial venous sinuses
(Lymph) nodes of the Scalp
Submandibular lymph nodes (anterior part of the scalp and forehead drain into these)
Superficial parotid/preauricular nodes (drainage from the lateral part of the scalp above the ear)
Mastoid nodes (drainage from part of the scalp above and behind the ear)
Occipital nodes (drainage from the back of the scalp)
Why does the scalp have an abundant blood supply?
To nourish the hair follicles
Why is bleeding of the scalp often hard to stop?
Because the arterial walls are attached to fibrous septa in the subcutaneous tissue
The attachment to the fibrous septa makes the walls unable to contract or retract to allow blood clotting to take place
What is the only effective way to stop bleeding of the scalp?
Applying local pressure to the laceration
At what point will a laceration to the scalp need to be sutured?
When the wound is deep enough to divided the cranial aponeurosis (which is produced by the tone of the Occipitofronalis muscle)
The skin of the face contains what 2 types of glands
Sweat and sebaceous
How is the skin attached to the underlying bones? And what is embedded in there?
Loose connective tissue
Muscles of facial expression
Is there deep fascia in the face?
Nope. Nada. None.
What are wrinkles of the face a result of?
Repeated folding of the skin perpendicular to the long axis of the underlying muscles.
Aging skin loses its elasticity.
How can surgical scars of the face be less conspicuous?
If they follow wrinkle lines.
The skin of the face is supplied by branches of 3 divisions of the:
Trigeminal nerve
The trigeminal nerve supplies the skin of the face except at:
A small area over the angle of the mandible and the parotid gland.
Supplied by the great auricular nerve
What supplies sensory innervation to the mouth, teeth, nasal cavities, and paranasal air sinuses?
Trigeminal nerve
What are the divisions of the trigeminal nerve?
Ophthalmic, maxillary, and mandibular
What does the ophthalmic division of the trigeminal nerve supply?
Supplies the skin of the forehead, upper eyelid, conjunctiva, and side of nose down to and including the tip
What are the branches of the ophthalmic division of the trigeminal nerve
Lacrimal nerve Supraoribital nerve Supratrochlear nerve Infratrochlear nerve External nasal nerve
What does the maxillary division of the trigeminal nerve supply?
Skin on the posterior part of the side of the nose, the lower eyelid, the cheek, the upper lip, and the lateral side of the orbital opening
What are the 3 cutaneous branches of the maxillary division of the trigeminal nerve?
Infra orbital nerve
Zygomaticofacial nerve
Zygomaticotemporal nerve
What does the mandibular division of the trigeminal nerve supply?
The skin of the lower lip, the lower part of the face, the temporal region, and part of the ear
What are the three cutaneous branches of the mandibular division of the trigeminal nerve?
Mental nerve
Buccal nerve
Auriculotemporal nerve
What are the two arterial sources of the face?
Facial and superficial temporal arteries
The blood supply is supplemented by small arteries that accompany the _______ _______ of the face.
Sensory nerves
Where can you feel the pulse of the facial artery?
Where the facial artery curves around the inferior border of the mandible at the anterior border of the masseter muscle
The facial artery is covered by the _______ and _________ muscles
Platysma and risorious muscles
at the medial angle of the eye, the facial artery anastomoses with branches of the _____________ artery
Ophthalmic
Branches of the facial artery
Submental artery
Inferior labial artery
Superior labial artery lateral nasal artery