Navigating the Peripheral Nervous System Purpose: This assignment is designed to help you explore, practice and…

Navigating the Peripheral Nervous System Purpose: This assignment is designed to help you explore, practice and understand the anatomy of the peripheral nervous system (PNS), become fluent with terminology, and identify areas requiring further study. This is an important step toward being able to apply your knowledge of neuro- anatomy to actual clinical cases in your professional careers. This activity is worth 2 points. When you are finished, I hope you will have a better understanding of: • The vocabulary used to describe the nervous system (see the attached vocabulary list) The afferent (sensory) and efferent (motor) neural pathways of the peripheral nervous system (PNS) • Some anatomic differences between the somatic nervous system and the autonomic nervous system (ANS) • The structural features of the sympathetic division of the ANS Any questions that remain unanswered for you, leaving gaps in your understanding Tasks: Using the attached diagrams and colored pens, pencils or crayons, complete the following: Begin with side A: 1. Label each structure you see in the diagram. Use the attached vocabulary list as a guide, if necessary. Note that not every word will be used. Use any resources you need. 2. When you feel confident with the terminology, answer the following questions, drawing on the diagram to illustrate the answer: What path(s) does an afferent nerve take from PNS to CNS? Where is its cell body located? What path(s) does a SOMATIC efferent nerve take from CNS to PNS? Does it synapse? Now look at side B: 1. Label: sympathetic chain ganglia collateral ganglia white rami communicans gray rami communicans lateral gray horns Note that all of the other structures are the same as those labeled on side A. Use any resources you need to complete the diagram. 2. When you feel confident with the terminology answer the following questions, drawing on the diagram to illustrate the answer: Where are the cell bodies of sympathetic visceral motor (efferent) neurons located? Are these preganglionic or postganglionic? Where are the cell bodies of the postganglionic neurons located? What are four paths the pair of sympathetic efferent neurons can take to get to their effector organs? Draw them on your diagram Vocabulary CNS / PNS somatic / visceral/ autonomic voluntary / involuntary gray matter / white matter ventral/dorsal roots / rami nuclei / ganglia axon / neuron cell body / synapse myelinated/unmyelinated tracts / nerves sensory / motor / mixed afferent / efferent gray horns: ventral / lateral / dorsal spinal nerve / cranial nerve / splanchnic nerve dorsal root ganglia / sympathetic chain ganglia / collateral ganglia rami communicans (white vs gray) • sympathetic / parasympathetic median cell bodies e lateral pray horno T-L2 median ventral royuan to adrena medulla