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Anatomy
Lecture 3 Base of skull and brain
9
Medical
Graduate
10/22/2008

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Cards

Term
What are the layers of the scalp?
Definition
Skin, connective tissue (dense, irregular, collagenous CT; distributes neurovascular supply so scalp), aponeurosis, loose connective tissue, pericranium
Term
What three structures make up the aponeurosis of the scalp?
Definition
the occipitalis muscle, galea aponeurotica, and frontalis muscle.
Term
What layer of the scalp could pus and infection potentially spread through? What type of vasculature make this a serious risk for brain infections?
Definition
Infection could potentially spread through the loose connective tissue of the scalp. Emissary veins make this a real risk for brain infection.
Term
Which carotid artery supplies blood to the anterior aspect of the scalp? How?
Definition
The internal carotid artery sends blood to the anterior aspect of the scalp via the opthalmic artery and out through the supratrochlear and supraorbital branches.
Term
What branches of the external carotid artery supply blood to the scalp?
Definition
superficial temporal, posterior auricular, and occipital arteries.
Term
What nerves innervate the front portion of the scalp?
Definition
CN V-1, 2, 3
Term
What spinal nerves innervate the scalp?
Definition
Greater occipital, least occipital (dorsal rami) and lesser occiptial (ventral ramus off cervical plexus). Mostly Greater Occipital N.
Term
What are the main bones of the neurocranium?
Definition
frontal, parietal, temporal, occipital, sphenoid, and ethmoid bones.
Term
What are the sutures on the skull?
Definition
sagittal, lambdoid, coronal. There is also a landmark called the pterion where the temporal, frontal, parietal, and sphenoid bones meet.
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