Brooke Arrington A Case of Spinal Cord Injury Questions 5-8 By David F. Dean, Department of Biology, Spring Hill College 5. Define the terms dermatome and myotome and explain how each relates to sci. Dermatome is the area of the skin supplied by nerves from a single spinal root. Myotome is a group of muscles supplied with nerves by the motor fibers of a single nerve and are necessary for proper motor function. Dermatome allows for sensations such as touch and pain. These nerves come from the specific sections of the spinal cord and can help determine the level/location of SCI. 6. Define the term stretch reflex and describe how such reflexes are used to anatomically localize sci. In a stretch reflex, muscles contract in response to a stretching force applied to them. They’re used to determine central nervous system responses, or lack of response. If you don’t get a response from an area, you know the nerves aren’t responsive, or the brain isn’t receiving a signal from that area, allowing you to anatomically localizing the sci.
- Fall '16