3. Layers
S : Skin
C : dense Connective tissue
A : Aponeurosis of occipito-frontalis
L : Loose connective tissue
P : Pericranium
First 3 layers forms a single
functional layer
5. Skin
â Thickest , 3-7 mm
â Abundance of hair,
sebaceous, sweat glands
Dense Connective tissue
â Corresponds to superficial
fascia
â Dense fibro fatty tissue
â Numerous blood vessels and
nerves
â Connects layer of skin with
aponeurosis
6. ⢠Aponeurosis of occipeto-frontalis muscle
Attachments of muscle
⢠Frontal belly
â Ant: Skin of eyebrows, skin of root of nose &
orbicularis oculi
â Post: aponeurosis
⢠Occipital belly
â Behind : to lat ½ half of superior nuchal line
â Front : aponeurosis
⢠Functions
â Occipital belly : pulls scalp back, anchors aponeurosis
â Frontal belly : elevate eyebrow, transverse wrinkles
⢠Nerve supply: facial nerve
Occipitalis is attached to bone, frontalis is not
Aponeurosis (galea aponeurotica)
7. Loose connective tissue
⢠Loose areolar tissue
⢠Contain emissary veins
⢠Potential space over which
layer 1 to 3 move
Pericranium
⢠Periosteum of bone of skull
⢠Intimately adherent to
endocranium
⢠Firmly attached to suture
lines, loose elsewhere
13. 1
2
3
4
5
6
8
7
9
10
1. Supratrochlear (V1)
2. Supraorbital (V1)
3. Z-T (V2)
4. Temp br CN VII
(supply frontalis)
5. Auriculotemp N
(V3)
6. Great auricular
( C1,C2)
7. Post auricular (CN
VII N- supply occipital
belly))
8. Lesser occipital
(C2, C3)
9. Greater occipital
(C2)
10. Third occipital (C3)
Supratrochlear â br of opth art
Supraorbital â br of opth art
superficial temporal art-
terminal br of ECA
post auricular art â br of ECA
occipital art â br of ECA
SCALP
Nerve supply
Blood supply
14. Venous Drainage
â Veins accompany the
artery
â Emissary vein from scalp to
intracranial venous sinus
â Diploic vein
⢠Drain frontal and occipital
diploe and enter main vein
of scalp
Lymphatic Drainage
â In front of ear : pre-
auricular group
â Behind ear : post auricular
19. Hematoma in Scalp
⢠Caput succadeum : haematoma bt skin and aponeurosis
⢠Sub galeal haematoma :b/w aponeurosis and periosteum
⢠Cephalhaematoma :b/w skull bone and its periosteum
(limited by suture lines)