1. Identify the layers of the scalp. Enumerate the important structures found in each layer. 2. Identify the muscles associated with the scalp. Give its origin, insertion, action, and innervation. 3. Why is there a tendency for lacerations of the scalp to bleed profusely? 4. Which nerve provides sensory innervation to the scalp anterior to the vertex? 5. Which nerve provides sensory innervation to the scalp posterior to the vertex?.