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Exam 2 Review Sheet.docx - TBIOL 312 Fall 2017 Exam 2...

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TBIOL 312 Fall 2017 Exam 2 Review Sheet Lecture 9: Somatosensory System Recall the conduction velocities and types of information carried by different sensory fibers (slide 4-5). Proprioception: awareness of location of limbs and head in space Exteroception: touch, temperature, pain Interoception: autonomic receptors. Large Diameter: proprioception and touch. Conduction velocities are 5-6x Smaller diameter and unmyelinated: thermosensation (temp) and nociception (pain). Conduction velocities are 5-6x for small and 1-2x for unmyelinated. Recall the difference between direct and indirect mechanoreceptor activation (slide 6). Direct: Produces faster response. Indirect: goes through secondary messengers and is slower but can amplify mechanosensory and nociceptive signals. Briefly describe which nociceptive receptors and fibers carry which types of sensory information, and what this tells us about how receptive fields are formed and how pain sensations are formed and progress (slides 7-9) Meissner Corpuscle: 1 fiber: many receptors. Small receptive field. Rapidly adapting. Merkle Cell: 1 fiber: many receptors. Small receptive field. Slowly adapting. Pacinian Corpuscle: 1 fiber: 1 receptor. Large receptive field. Rapidly adapting. Ruffini Endings: 1 fiber: 1 receptor. Large receptive field. Slowly adapting. Dull, diffuse, burning pain is carried out by C fibers. Can be polymodal. Recognize how dermatomes are formed and the basic descriptions of spinal and cranial nerves (slide 10). Dermatome: a tissue area innervated by a single nerve. Spinal nerves: Most carry both motor and sensory information. Cranial Nerves: 8 out of 12 are either sensory or motor. 4/12 are mixed like the trigeminal nerve (sensory information of face/mouth and motor of chewing). Lecture 10: Voluntary Movement Label the dorsal column medial lemniscal and antereolateral pathway anatomy (slides 4- 5). Recognize and defend your logic as to where a lesion might be in the spinal cord or brain if presented with a functional motor or sensory deficit (slides 4-5). Recognize and defend your logic as to what type of sensory or motor deficit would ensue if presented with a lesion location (slides 4-5).
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