the VNC and recording the MGA and LGA responses; note the temperature on each recording with the comment command in the software and in your Tables 1 & 2. Replace the warmed saline with cold saline and repeat the warming sequence using your series to measure the refractory periods as the temperature rises. Explain your results (see Appendix 1). The change in conduction velocity with temperature maybe very pronounced as shown in Figure 13. Table 1: Absolute Refractory Period at Various Temperatures Temp 21C (room temp) Temp ? C Temp ? C Temp ? C LGA MGA 2: Relative Refractory Period at Various Temperatures Temp 21C (room temp) Temp ? C Temp ? C Temp ? C LGA MGA Figure 13: Illustrating a change in conduction velocity with temperature. (Screen capture with windows and comments of temperature drawn on image) “Snip” 6. REFERENCES Bullock, T.H. (1945) Functional organization of the giant fiber system in Lumbricus. J. Neurophysiol. 8: 55-72 Cardone, B. and Roots, B.I. (1996) Monoclonal antibodies to proteins of the myelin-like sheath of earthworm giant axons: an immunogold electron microscopy study. Neurochem. Res. 21: 505-510 Cragg, B.G. and Thomas, P.K. (1957). The relationship between conduction velocity and the diameter and internodal length of peripheral nerve fibers. J. Physiol. 136: 606-614. Drewes, C.D., K.B. and McFall, J.L. (1978) Giant nerve fiber activity in intact, freely moving earthworms. J. Exp. Biol. 72: 217-227. Drewes, C.D. and Pax, R.A. (1972). Electrophysiological studies of earthworm longitudinal muscle. Am. Zool. 12, xlii. (abstract).
the VNC and recording the MGA and LGA responses; note the temperature on each recording with the comment command in the software and in your Tables 1 & 2. Replace the warmed saline with cold saline and repeat the warming sequence using your series to measure the refractory periods as the temperature rises. Explain your results (see Appendix 1). The change in conduction velocity with temperature maybe very pronounced as shown in Figure 13. Table 1: Absolute Refractory Period at Various Temperatures Temp 21C (room temp) Temp ? C Temp ? C Temp ? C LGA MGA 2: Relative Refractory Period at Various Temperatures Temp 21C (room temp) Temp ? C Temp ? C Temp ? C LGA MGA Figure 13: Illustrating a change in conduction velocity with temperature. (Screen capture with windows “Snip” and comments of temperature drawn on image) 6. REFERENCES Bullock, T.H. (1945) Functional organization of the giant fiber system in Lumbricus. J. Neurophysiol. 8: 55-72 Cardone, B. and Roots, B.I. (1996) Monoclonal antibodies to proteins of the myelin-like sheath of earthworm giant axons: an immunogold electron microscopy study. Neurochem. Res. 21: 505-510 Cragg, B.G. and Thomas, P.K. (1957). The relationship between conduction velocity and the diameter and internodal length of peripheral nerve fibers. J. Physiol. 136: 606-614. Drewes, C.D., K.B. and McFall, J.L. (1978) Giant nerve fiber activity in intact, freely moving earthworms. J. Exp. Biol. 72: 217-227. Drewes, C.D. and Pax, R.A. (1972). Electrophysiological studies of earthworm longitudinal muscle. Am. Zool. 12, xlii. (abstract).
EARTHWORM%20GIANT%20AXONS.docx