Bar 30 microns expanded view slide 16 peripheral

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Bar = 30 Microns Expanded View Slide 16 Peripheral Nerve A longitudinal view shows the characteristics of a peripheral nerve: a wavy pattern and a washed-out appearance (from the loss of myelin during processing). The RBCs (about 10 microns each) serve as built-in scale bars. Bar = 100 Microns Expanded View
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Slide 17 Peripheral Nerve Another look shows the same characteristics of the longitudinal peripheral nerve. The washed-out appearance and nodes of Ranvier distinguish it from smooth muscle, connective tissue, cartilage, etc. Bar = 100 Microns Expanded View Slide 18 Node of Ranvier A closer look shows a node of Ranvier (red arrow). These "breaks" in myelination allow for saltatory conduction. Use the RBCs as a size scale. Bar = 1mm Expanded View
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Slide 19 Node of Ranvier Another node of Ranvier more clearly shows the dark axon as it continues through the node. Notice again the washed out appearance of the nerve. Bar = 1 mm Expanded View Slide 20 Peripheral Nerve In cross section, the dark axons are clearly seen within the myelin sheath (red arrow). Notice also the smaller B fibers (blue arrow). They too are myelinated. Bar = 250 Microns Expanded View
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Slide 21 Pacinian Corpuscle The Pacinian corpuscles are large "onion-like" encapsulated pressure receptors. The surrounding concentric lamellae respond to distortion and generate an action potential in the unmyelinated fiber in the core. Bar = 100 Microns Expanded View
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