Skin+Periosteum
Layers involved in a superficial scalp wound
Skin + CT
Two muscles is the aponeurosis associated with (anterior and posterior attachment)
Frontalis and occipitalis
The function of this layer
Free movement of the first three layers over the underlying skull
The thickest layer of the scalp
Connective tissue
Describe what would happen when this layer gets injured (mention what happens with the wound edge)
Wound edges held closely together
Describe the aponeurosis
A sheet of pearly white fibrous tissue that takes the place of a tendon in flat muscles having a wide area of attachment. Broad and tendinous sheet
Describe this layer
Sponge-like layer of areolar tissue
The two main arteries supplying blood to the scalp
External carotid and Internal carotid
The 4 components of the connective tissue
Nerves, Blood vessels, Adipose, Dense fibrous tissue
The number of muscles on the scalp
2
Role of this layer in profusely bleeding seen in scalp lacerations
Dense CT which restricts constriction on vessels
Clinical importance of this layer
Potential space for collection and hematomas
Vessels that supply superficial structures of the scalp
1. Occipital
2. Posterior auricular
3. Superficial Temporal
The layer is considered the danger area AND the reason why
Loose CT layer
Contains emissary veins which are valveless
They connect extracranial veins to intracranial dural venous sinuses
Potential pathway for the spread of infection from scalp to intracranial space