B5

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B5 is a type of buccal neuron found in Tritonia

The B5 neuron of the nudibranch mollusc Tritonia is a pair of neurons that controls the feeding rhythm of the organism. Theses neurons have apparent pattern generating capabilities that aide in rhythm activation. B5 neurons fire very strong impulses based on rebound from spontaneous IPSP waves. These extended depolarizing currents that enter the neuron chart the time and duration of the feeding mechanism.

Molecular profile

Neurotransmitters: The B5 neuron primarily utilizes acetylcholine for most of its regulatory processes and functions.

Physiology

The B5 motor neuron has depolarizing afterpotentials also known as DAP's. The buccal motor neurons have an ionic dependency that mirrors that of a pacemaker cell in pleural neurons. Reducing the DAP's reduces the buccal neurons ability to generate and regulate bursts of action potentials which govern and control the feeding mechanism. This function helps control and aide the motor neuron synthesis in the buccal ganglion of the organism. The Neuron receives its primary activation from the cerebral ganglion and then acts to innervate the buccal region of the mollusk. It acts upon this area in a controlled bursting mechanism which clocks in and out.

Behavior

The B5 neuron aids the Tritonia's feeding mechanism when the organism bites and draws in pieces of its prey into the buccal cavity. Tritonia then swallows the pieces in cyclic and ordered digestive movements. It is a regulating motor neuron and acts to time the buccal region in a consistent feeding arena.

References

  1. Altrup, U., and E. J. Spekkman. "Identified neuronal individuals in the buccal ganglia ofHelix pomatia." Neuroscience and Behavioral Physiology 24.2 (1994): 23-32.
  2. Jordan, R., K. P. Cohen, and M. D. Kirk. "Control of intrinsic buccal muscles by motoneurons B11, B15, and B16 in Aplysia californica." The Journal of Experimental Zoology 265.5 (1993): 496-506.
  3. Lloyd, P. E., and A. O. Willows. "Multiple transmitter neurons in Tritonia. II. Control of gut motility." Journal of Neurobiology 19.1 (1988): 55-67.
  4. Willows, A. O., P. E. Lloyd, and B. P. Masinovsky. "Multiple transmitter neurons in Tritonia. III. Modulation of central pattern generator controlling feeding." Journal of Neurobiology 19.1 (1988): 69-86.
  5. Willows, A. O. "Physiological basis of feeding behavior in Tritonia diomedea. II. Neuronal mechanisms." Journal of Neurobiology 44.5: 849-61