Student Notes LAB 11

Student Notes LAB 11 - Lab 11 A. B. C. Lab Exercise 17...

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Lab 11 Lab Exercise 17 Histology of Nervous Tissue Pages 257-264 A. Neuroglial Cells (glial cells) – supporting cells 1. CNS a. Astrocytes b. Oligodendrocytes c. Microglia d. Ependymal cells 2. PNS a. Schwann cells b. Satellite cells B. Neuron Anatomy 1. Cell Body a. Ganglia versus Nuclei b. Nissl bodies 2. Dendrites 3. Axons a. Axon collaterals b. Axon hillock c. Axonal terminals or synaptic knobs (or boutons) d. Myelinated fibers 1) Schwann cells (PNS) 2) Myelin sheath 3) Neurilemma 4) Nodes of Ranvier (neurofibril nodes) 5) Oligodendrocytes (CNS) C. Classification of Neurons 1. Structural Classification a. Unipolar Neurons(pseudounipolar) (most sensory neurons) b. Bipolar Neurons (retina of eye, inner ear, olfactory region) c. Multipolar Neurons (most CNS neurons and efferent neurons) 2. Functional Classification a. Sensory (Afferent) Neurons b. Association Neurons, Interneurons, Connecting Neurons c. Motor (Efferent) Neurons D. Structure of a Nerve 1. Epineurium 2. Fascicles 3. Perineurium 4. Endoneurium E. Types of Nerves 1. Sensory (Afferent) Nerves 2. Motor (Efferent) Nerves 3. Mixed Nerves (both sensory and motor fibers) – all spinal nerves are mixed nerves F. Do Review Sheet 17 pp. 265-268
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Lab Exercise 18A and 18B; Neurophysiology of Nerve Impulses: Wet Lab and Simulation A. The Nerve Impulse 1. RMP 2. Threshold Stimulus 3. Depolarization 4. Repolarization 5. Action Potential 6. Absolute Refractory Period 7. Relative Refractory Period 8. Nerve Impulse 9. Sodium-Potassium Pump B. The Computer Simulation: 1. Eliciting a Nerve Impulse a. Electrical Stimulation (activity 1) b. Mechanical Stimulation (activity 2) c. Thermal Stimulation (activity 3) d. Chemical Stimulation (activity 4) 2. Inhibiting a Nerve Impulse a. Testing the effects of ether (activity 5) b. Testing the effects of curare (binds to Ach binding sites on postsynaptic cell membrane, preventing the Ach from acting) (activity 6) c. Testing the effects of lidocaine (a sodium-channel antagonist; blocks sodium channels from opening, inhibiting any action potentials from being generated) (activity 7) 3. Nerve Conduction Velocity (earthworm nerve, frog nerve, rat nerve 1 medium-sized unmyelinated nerve, rat nerve 2 large myelinated nerve) a. Measuring nerve conduction velocity (activity 8) C. Do Review Sheets 18A pp. 277-278 18B pp. PEx-47-48 D. Motor Points Experiment (on yourselves)
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Lab Exercise 19; Gross Anatomy of the Brain and Cranial Nerves Pages 279-297 A. Organization of the Nervous System 1. CNS 2. PNS B. CNS 1. Brain a. Forebrain [prosencephalon] 1) Telencephalon a) Cerebrum - cerebral hemispheres corpus callosum fornix septum pellucidum - gyri - sulci - fissures - lobes [1] Cerebral Cortex - postcentral gyrus – primary somatosensory area posterior is the somatosensory association area - precentral gyrus – primary motor area Broca’s area (usually left side)
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Student Notes LAB 11 - Lab 11 A. B. C. Lab Exercise 17...

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