THE SCALP

The soft tissues covering the cranial vault

EXTENT OF SCALP

• Anteriorly : supraorbital margins
• Posteriorly : external occipital protuberance and superior nuchal line
• Each sides : superior temporal line

LAYERS OF SCALP

5 LAYERS
• Skin
• Connective tissue(superficial fascia)
• Aponeurosis(deep fascia)
• Loose areolar tissues
• pericranium

ARTERIAL SUPPLY

5 sets of arteries on each side of scalp
• 3 in front of auricle
• 2 behind the auricle
• Out of 5,2 arteries (indirectly) from ICA
• 3 arteries (directly from

VENOUS DRAINAGE OF SCALP

LYMPHATIC DRAINAGE

NERVE SUPPLY

APPLIED ANATOMY

Black eye
- Blow on skull
- Collection of blood in the sub aponeurotic space
- Blood slowly gravitates into the eye lids because the frontalis has no bony attachments

Scalp lacerations
Sebaceous cysts
Gaping wounds
Cephalheamatoma
Bone flaps
Caput succedaneum
Safety valve mechanism
Dangerous area of scalp
- The emissary veins do not have valves and open in the loose areolar tissue; therefore, infection can be transmitted from the scalp to the cranial cavity. The layer of loose areolar tissue is known as the dangerous area of the scalp

The soft tissues covering the cranial vault

LAYERS OF SCALP

ARTERIAL SUPPLY

VENOUS DRAINAGE OF SCALP

LYMPHATIC DRAINAGE

NERVE SUPPLY

APPLIED ANATOMY

MCQs

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