ANTR 350 Lecture Notes - Lecture 6: Skeletal Muscle, Epidural Administration, Arachnoid Mater
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Identify the following on figure 16. 5 spinal nerve branches: spinal cord, spinal nerve, anterior/ventral root, posterior/dorsal root, posterior/dorsal root ganglion, rami communicantes, anterior ramus, posterior ramus. List the structures innervated by posterior primary rami versus anterior primary rami. Posterior ramus- innervate intrinsic back muscles and skin of back; Anterior ramus- innervate anterior and lateral portions of the trunk, upper limbs and lower limbs. Define the following terms: dermatome: ribbon around part of the body that is innervated by a single spinal nerve. Or a specific segment of skin supplied by a single spinal nerve: myotome: group of muscles innervated by a single spinal nerve, nerve plexus: a network of intersecting nerves of the anterior rami of spinal nerves. Specify the location of a somatic motor (efferent) neuron"s cell body, the type of tissue it innervates, and explain the direction of its impulses in relation to the central nervous system.
