PNB 2250 Lecture Notes - Lecture 32: Bony Labyrinth, Binocular Vision, Lateral Inhibition

• School: UConn
• Department: Physiology and Neurobiology
• Course: PNB 2250
• Professor: Joseph Crivello

Document Summary

Vertebrate nervous system evolution: highly developed brain and spinal cord, neurons with specific functions. Wide variety of nt: presence of ganglia. Very high order information processing: well-developed sensory organs, well-developed collection of neurons with specific functions. Regionalization of cells: clear demonstration of very sophisticated information processing. Color perception: development of a spinal column. Can detect color: very sensitive nose. Much more sensitive than mammalian olfaction: lateral lines. Very sensitive detection of vibrations in the water column: a(cid:374) appa(cid:396)e(cid:374)t co(cid:373)ple(cid:454) task does(cid:374)"t alwa(cid:455)s (cid:396)e(cid:395)ui(cid:396)e a lot of (cid:374)eu(cid:396)o(cid:374)s. Tail flip: two large brain neurons integrate information. Input from body sides water disturbances (specific) Activation of sensory cells within vestibular labyrinth. Activation of one mauther cell and inhibition of the other. Very fast conduction velocities: fish electrical organs. Has arisen 6 independent times in evolutionary history. Week 13 lecture 32 evolution of vertebrate nervous systems. Ability to discharge large number of cells and generate an electrical field detectable in the water column.