Identification of neurons involved in the earthworm Amynthas hawayanus reflex activity |
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Institution: | Department of Physiology, Federal University of Parana, CP 8621, Curitiba 80021, Brazil |
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Abstract: | - 1.1. The medial (MGF), lateral (LGF) and motor (RMS-2) giant neurons were confirmed as neural components in the earthworm Amynthas hawayanus polysynaptic reflex circuit by simultaneous potential recording and dye injection.
- 2.2. The reflex was initiated from the mechanoreceptors when evoked by mechanical stimulation but electrical stimulation also evoked an antidromic response in the motoneuron.
- 3.3. The primary reflex response propagates decrementally along both giant axons but directly evoked action potentials conduct in an all-or-none fashion.
- 4.4. The secondary reflex response continues to propagate after the primary response disappears.
- 5.5. A rhythmically discharging neuron of uncertain function was also identified.
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