Scalp And Temple Flashcards
What is scalp
Soft tissue covering the vault of skull
Extent of scalp
From above eyebrows to superior nuchal Line in posterior and superior temporal line in each side
Layers of scalp
Skin
Connective tissue layer
Aponeurosis ( occipitofrontalis muscle and it aponeurosis)
Loose areolar tissue
Pericranium
Describe skin of scalp
Thick and hairy except at forehead.
Firmly attached to the epicranial aponeurosis by connective tissue of superficial fascia.
Contains numerous hair follicles and sebaceous glands. Hence scalp is the commonest site for sebaceous cyst.
Explain about the connective tissue layer of scalp
It consists of dense connective tissue layer that binds the skin to the epicranial aponeurosis.
Fibrous septa divides this layer into small pockets containing lobules of fat. Blood vessels are also present in this layers
How many bellies does the occipitofrontalis muscle has
Two bellies
Occipitalis and frontalis.
Both are inserted to the epicranial aponeurosis.
Describe occipital belly of occipitofrontalis
Small and separate
Arise from lateral 2/3rd of superior nuchal line
Supplied by posterior auricular branch of the facial nerve.
Describe frontal belly of occipitofrontalis
Wider longer and partly united in the median plane.
It arises from the upper eyelid and the forehead
Supplied by the temporal branch of the facial nerve.
Aponeurosis in the third layer is also called
Epicranial aponeurosis or galea aponeuritica
What are the first three layers of scalp called
Surgical layers of scalp or the scalp proper
Function of occipitofrontalis muscle
Rises the eyebrows and forms horizontal wrinkles in the forehead
Extent of loose connective tissue layer
Extend anteriorly to the eyelid because the frontalis muscle has no bony attachment.
Posteriorly it is attached to the highest and superior nuchal line.
On each sides to the superior temporal lines.
Pericranium
Loosely attached to the bones and firmly attached to the suture
