Scalp.pdf all the information...layers of scalp

Layers of scalp

1. OBJECTIVES
•By the end of this 2-hour demo, the 2
nd
year MBBS student should be
able to:
•Describe the scalp and its layers
•Describe the neurovasculature of the scalp
•Describe its clinical correlates
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3. 3
S - Skin
C - Connective tissue
A - Aponeurosis
L - Loose Connective tissue
P - Pericranium

4. 4

5. SKIN
•Is thin, except in the occipital region
where it’s the thickest in the body
•Contains many sweat and sebaceous
glands and hair follicles
•Has an abundant arterial supply
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6. CONNECTIVE TISSUE
•Also referred to as subcutaneous
layer/tissue
•Comprised of dense regular
connective tissue
•It is this layer which has the scalp’s
blood vessels
•Well supplied with cutaneous
nerves

7. APONEUROSIS
•Also referred to as galea
aponeurotica or epicranius
•Is a tendinous sheet covering the
calvaria and serves as the
attachment for muscle bellies
converging from:
•Frontalis
•Occipitalis
•Temporoparietalis
•Anterior auricular
•Posterior auricular

8. •Bellies of occipitalis are separated
by the aponeurosis
•Frontalis muscle arises from the
aponeurosis and attaches to the
upper part of orbicularis oculi
•Its bellies meet in the midline and
blend with the procerus muscle

9. LOOSE AREOLAR
TISSUE
•Provides a plane above which the
rest of the scalp can move
•This space extends down beneath
orbicularis oculi into the eyelids
•Known as the danger area of the
scalp

10. PERIOSTEUM
•Also referred to pericranium
•Loosely attached to the bone
except at the sutures of the skull
•Is easily stripped up by a
subperiosteal hematoma

11. BLOOD SUPPLY
ARTERIAL SUPPLY & VENOUS DRAINAGE
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•Maxillary artery
•Occipital artery
•Superficial temporal artery
•Posterior auricular artery
External Carotid Artery
•Supraorbital artery
•Supratrochlear artery
Internal Carotid Artery
CV
CV

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14. NERVE SUPPLY
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V1
V2
V3

16. CLINICAL CORRELATES
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