Anatomy Of The Scalp And Face Flashcards
The _____ is the soft tissue layer of the skull
scalp
The Scalp extends from the ________ to the ________
Suprior Nuchal Line, Superior Orbital Ridge
The Extent of the scalp covers the vault of the skull & extends to the right & left ___________, the eye brows and the ___________.
- temporal lines,
2. superior nuchal lines
The layers of the Scalp:
S –skin; C- connective tissue; (dense) A- aponeurosis L- loose connective tissue; P- pericranium.
the skin of the scalp is the thickest in the body and especially at the ________ region
occipital region
The skin of the scalp bears the hair follicles (hairiest), richly supplied by __________
NB: It is the commonest site of sebaceous cysts in the body.
sebaceous glands
The Connective tissue layer (dense) of the scalp consists of ____1_____ bound in tough fibrous septa + ____2___ of the scalp lie in this layer
- lobules of fat
blood vessels
______ has the richest cutaneous blood supply of the body
The Connective tissue layer (dense)
The Connective tissue layer (dense) has the richest cutaneous blood supply of the body hence there is profuse ____1_____ from a ____2_____or operation site.
(1) haemorrhage
(2) scalp laceration
Vein of the scalp connect with the intracranial venous sinuses via numerous ___________ which pierce the skull & link the 2 venous sinuses with the _________ btw the skull vault
- emissary veins
2. diploic veins
Vein of the scalp connect with the intracranial venous sinuses via numerous emissary veins which pierce the skull & link the 2 venous sinuses with the diploic veins btw the skull vault
thus
.»> superficial infection of the scalp may spread via this system resulting in an ____1____ , ____2____ & _____3_____
- Osteitis of skull
- Meningitis
- Venous sinus thrombosis
__________ is a fibromuscular layer of the Occipitofrontalis
APONEUROSIS
The Aponeurosis is ____1___ over the dome of the skull but ___2___ in the occipital & frontal regions
- fibrous
2. muscular
The Aponeurosis of the Occipitofrontalis muscle
- Arise : _____________
- Insert: _____________
- from the superior nuchal line of the occipital bone
2. Into the zygomatic arch & anteriorly into the subcutaneous tissues of the eyebrows & nose.
The Aponeurosis of the Occipitofrontalis muscle
arises from the _______1____ of the occipital bone & insert into the ____2____ & anteriorly into the subcutaneous tissues of the eyebrows & nose.
- superior nuchal line
2. zygomatic arch
____________ lies beneath the aponeurosis & accounts for the mobility of the scalp on the underlying bone.
The loose connective tissue layer
Blood or pus collecting in this loose tissue track freely under the scalp but cannot pass into either the occipital or subtemporal regions because of the attachments of the ____________.
occipitofrontalis muscle
________________ adheres to the suture lines of the skull
The Periosteum or Pericranium layer
___________ does not cross sutural line unlike caput succedaneum.
Cephalhaematoma
This region of the scalp is supplied by branches of the ___________
NB: except for the forehead which is supplied by the supra-orbital & supra-trochlear arteries.
External carotid artery
NB: except for the forehead which is supplied by the supra-orbital & supra-trochlear arteries.
Branches from External Carotid:
5.
- superficial temporal artery; (anterior & posterior branches)
- middle temporal artery
- transverse facial artery
- posterior auricular artery
- occipital artery
Branches from External Carotid:
- superficial ________artery; (anterior & posterior branches)
- middle ______ artery
- transverse ______ artery
- posterior ________ artery
- _______ artery
- Temporal
- temporal facial
- facial
- auricular
- occipital
Clinical importance for the scalp:
The arteries of the scalp ____1____ freely with each other & those of the opposite side, therefore, wounds of the scalp bleed profusely, but ____2___.
- anastomose
2. heal fast
Clinical importance for the Arteries of the scalp:
These arteries of the scalp anastomose freely with each other & those of the opposite side, therefore, wounds of the scalp bleed profusely, but heal fast.
The The scalp is drained by the following veins:
6.
- Facial vein
- superficial temporal vein
- middle temporal vein
- posterior auricular vein
- occipital vein
- Emissary veins
Facial vein is formed by the union of the_____ + _____veins
Mnemonic: SUPRA T and SUPRA O - Veins
supratrochlear + supra-orbital
Retromandibular vein - anterior and posterior branches is formed by the union of the ________ + _________ veins
Mnemonic : Superficial and Middle T - Veins
Superficial temporal + middle temporal veins
Internal Jugular Vein
is formed by the union of the _______ + _______veins
Mnemonic: AR, F - Veins
Anterior branch of Retromandibular + Facial Veins
External Jugular Vein is formed by the union ______ + _____veins
Mnemonic PR, PA - Veins
Posterior branch of Retromandibular + Posterior Auricular veins
Clinical importance for the veins of the scalp:
These veins + other emissary veins have communications with veins in the ___1___ & form routes along which ___2___ may spread into the skull from outside the skull.
- orbits,
2. infection
Innervation oft the scalp:
The superficial structures of this region & of the face receive:
MOTOR innervation = ____1____
SENSORY innervation= _______+ _________
SYMPATHETIC innervation to: _______, ______, _______
- Facial nerve
- Trigeminal nerve + 2nd & 3rd cervical spinal nerves.
- blood vessels, sweat glands & arrectores pilorum
Innervation oft the scalp:
The superficial structures of this region & of the face receive:
MOTOR innervation = Fa__al nerve &
SENSORY innervation= Trigeminal nerve + 2nd & 3rd ____ spinal nerves. +
SYMPATHETIC innervation to: blood vessels, sweat glands & ____________
- Facial Nerve
- cervical
- arrectores pilorum
SENSORY INNERVATION OF THE SCALP
Is from 2 major sources: _________ or _________ nerves, depending on whether it is Anterior or Posterior to the ear & Vertex of the Head.
cranial or cervical nerves
Anterior to the Ear & Vertex:
Supplied by branches of Trigeminal nerve (V) namely:
- _________ and ___________
- __________ and _______
Mnemonic
- SUPRA T and SUPRA O nerves
- Z- A Temporal nerves
- supratrochlear and supra-orbital;
- zygomatico and Auriculo temporal nerves.
Posterior to the Ear & Vertex:
the sensory innervation is by the cervical nerves especially branches from spinal cord levels C2 & C3 namely:
- __________ and _______
- ___________ and _________
Mnemonic
- G and L Auricular nerves
- G and 3 Occipital nerves
- great and lesser auricular Nerves
2. greater and the 3rd occipital nerves
________ is that area of the anterior skull which lies between the supercilliary arches superiorly, the lower edge of the mandible inferiorly, and as far back as the ears on either side.
the face
_________ is that area of the front of the head between the ears and from the chin to the hairline (or where it ought to be).
The face
Clinical importance of the face:
3.
- is an important initial contact between individuals for identification (face-to-face meeting); (facial identification);
- used for facial expression to convey emotions;
- provides important information about an individual’s/ patient’s general health to the physician.
-The skin of the face has numerous ___1____ and ____1___ glands It varies in thickness & is very thin on the eyelid.
- sweat and sebaceous glands.
The muscles of the face develop from the mesoderm of the ________1_____ and are innervated by the branches of the ___________
- 2nd pharyngeal arch
2. Facial nerve (CN VII).
muscle of the face are in the superficial fascia, with origins from either ______1______ and insertion into the skin.
- bone or fascia
2. skin
Functions of the muscles of the Face:
1.
2.
- also called muscles of expression because they control expression of the face;
- they act as sphincter & dilators of orifices of the face i.e. orbits, nose & mouth.
FUNCTIONAL GROUPING OF THE MUSCLES OF THE FACE INCLUDE:
- ORBITAL GROUP
- NASAL GROUP
- ORAL GROUP
- OTHER MUSCLES OR GROUPS
Nasal group of Facial muscles:
Mnemonic: NPD
- NASALIS
- TRANSVERSE PART ( Compress Nasal Aperture or Nostril)
- ALAR PART (Flares or Open Nostrils)
- PROCERUS ( Draws medial eyebrow inferiorly)
- DEPRESSOR SEPTI ( Pulls Nose inferiorly)
Oral group of Facial muscles:
- DEPRESSOR ANGULI ORIS and LEVATOR ANGULI ORIS ( Depress and Elevate Angle or conner of the mouth respectively)
- DEPRESSOR LABII INFERIORIS and LEVATOR LABII SUPERIORIS ( Draws and Lift Upper lip down, up and laterally)
- MENTALIS ( Wrinkles Skin on chin)
- RISORIUS (Draw conner of mouth Laterally or Retract conner of mouth)
- ZYGOMATICUS MAJOR (Draw conner of mouth upwards and laterally) & MINOR (Draw or Rises upper lip upward)
- LEVATOR LABII SUPERIORIS ALAEQUE NASI (Elevate Nose and Upper Lip)
- ORBICULARIS ORIS (Close and Protrude Lips)
- BUCCINATOR (Presses Cheek against Teeth)
Muscles of the face: OTHER MUSCLES OR GROUP:
Mnemonic: SAP (auricular) O
- SUPERIOR AURICULAR ( Elevates ear)
- ANTERIOR AURICULAR (Draw ear upwards and forward)
- POSTERIOR AURICULAR (Draw ear upwards and Backwards)
- OCCIPITOFRONTALIS
- FRONTAL BELLY ( Wrinkles forehead and raises eyebrows)
- OCCIPITAL BELLY ( Draws scalp backward)
FACIAL NERVE (CN VII) MOTOR
Supplies muscles of the _____,____, and _____
Its branches communicate freely with each other & with the branches of the ___________
- face, scalp, & auricle.
2. Trigeminal nerve
SCALP LACERATION
The scalp has an extremely rich blood supply from the _______1_____, so lacerations of the scalp tend bleed profusely.
Scalp bleeding is predominantly arterial because of 2 reasons:
First, in the erect position the venous pressure is extremely ___.
Second, the vessels do not ___3__ and __3____ when lacerated because the connective tissue in which they are found hold them open
- external carotid arteries
- low
- retract & close