A Comparison of the Tuning Properties of Chemoreceptor Cells in the First and Fourth Walking Legs of Female American Lobsters
| Autor: | K. M. Bayha, Jelle Atema, Rainer Voigt |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
medicine.medical_specialty
Stimulation Biology Hyperpolarization (biology) Stimulus (physiology) biology.organism_classification Sensory neuron medicine.anatomical_structure Endocrinology Manduca sexta Internal medicine medicine Extracellular General Agricultural and Biological Sciences Stretch receptor Sensory nerve |
| Zdroj: | The Biological bulletin. 185(2) |
| ISSN: | 1939-8697 |
| Popis: | Figure 2. Records of bending-reflex motor activity in larval and pupal Manduca sexta. Larval extracellular records are responses ofmotor neurons in the IeJi (L) and right (R) motor nerves innervating the intersegmental muscles (ISM). The responses areproduced by electrical stimulation ofthe IeJi stretch receptor sensory neuron (SRSN) alone (indicated by long bar); the right sensory nerve (DNa) carrying axons,fiom mechanosensillae (indicated by short b ar ); or the stretch receptor and DNa together. When the SRSN was stimulated alone, the stimulus induced motor activity coincident with the stimulus and a long burst of motor activity that occurred after a period of inactivity (mean duration of inactivity = 3.7 s, n = 5). Stimulation oJthe DNa only produced a typical, prolonged burst of activity on the stimulated side (mean duration of activity = 5.5 s, n = 5) and weak, or no, activity on the opposite side. The response evoked by stimulation ofthe DNa and the SRSN was virtually the same as that evoked by DNa stimulation only, and the response evoked by SRSN stimulation alone was absent. Pupal responses to stimulation ofthe IeJi DNa and the right SRSN are shown in recordings of IeJi (L) and right (R) motor nerves and in an intracellular recording ofa motoneuron innervating an intersegmenial muscle on the right (RMN). Stimulation ofthe pupal SRSN only produced &frequency motor activity coincident with the stimulus. Stimulation ofthe DNa only produced a typical, triphasic patterned response in which two high.frequency bursts of activity were separated by a period of inhibition. The response to simultaneous SRSN and DNa stimulation showed a weaker,hrst burst of activity, a period of hyperpolarization during which action potentials occurred, and a high,frequency second burst of activity (n = 4). |
| Databáze: | OpenAIRE |
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