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Mechanosensory neurons with bend- and osmo-sensitivity in mouthpart setae from the spiny lobster Panulirus argus

Garm, Anders LU ; Derby, CD and Hoeg, JT (2004) In Biological Bulletin 207(3). p.195-208
Abstract
The mouthparts of the spiny lobster Panulirus argus hold primarily two types of setae-simple setae and cuspidate setae. Mechanosensory neurons from these setae were examined by electrophysiological recordings. The population of simple setae contained two types of mechanosensory neurons: displacement-sensitive neurons, which responded to deflection at the setal base; and bend-sensitive neurons, which responded to bending of the setal shaft. Displacement-sensitive neurons, in general, responded phasically and only during actual displacement. Typically, their response changed with alteration of the direction, amplitude, and velocity/acceleration of the mechanical stimulus. Bend-sensitive neurons, in general, responded phaso-tonically and... (More)
The mouthparts of the spiny lobster Panulirus argus hold primarily two types of setae-simple setae and cuspidate setae. Mechanosensory neurons from these setae were examined by electrophysiological recordings. The population of simple setae contained two types of mechanosensory neurons: displacement-sensitive neurons, which responded to deflection at the setal base; and bend-sensitive neurons, which responded to bending of the setal shaft. Displacement-sensitive neurons, in general, responded phasically and only during actual displacement. Typically, their response changed with alteration of the direction, amplitude, and velocity/acceleration of the mechanical stimulus. Bend-sensitive neurons, in general, responded phaso-tonically and carried information on the direction and region of bending. This is the first experimental demonstration of bend sensitivity for arthropod setae. Cuspidate setae contain highly sensitive mechanosensory neurons; however, due to the rigid nature of these setae, whether they were bend sensitive or displacement sensitive could not be determined, and they were thus called "tactile neurons." Bend-sensitive neurons, but not displacement-sensitive neurons or tactile neurons, showed graded responses to changes in osmolarity. The osmosensitivity of these neurons could mediate behavioral responses to changes in the osmolarity of seawater or food. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Biological Bulletin
volume
207
issue
3
pages
195 - 208
publisher
Marine Biological Laboratory
external identifiers
  • wos:000226248400005
  • pmid:15616350
  • scopus:11144222631
ISSN
0006-3185
language
English
LU publication?
yes
id
e0f59609-3c92-4149-b0cd-4f11c2b825ca (old id 257658)
alternative location
http://www.biolbull.org/cgi/content/abstract/207/3/195
date added to LUP
2007-10-26 13:02:19
date last changed
2017-08-27 05:17:37
@article{e0f59609-3c92-4149-b0cd-4f11c2b825ca,
  abstract     = {The mouthparts of the spiny lobster Panulirus argus hold primarily two types of setae-simple setae and cuspidate setae. Mechanosensory neurons from these setae were examined by electrophysiological recordings. The population of simple setae contained two types of mechanosensory neurons: displacement-sensitive neurons, which responded to deflection at the setal base; and bend-sensitive neurons, which responded to bending of the setal shaft. Displacement-sensitive neurons, in general, responded phasically and only during actual displacement. Typically, their response changed with alteration of the direction, amplitude, and velocity/acceleration of the mechanical stimulus. Bend-sensitive neurons, in general, responded phaso-tonically and carried information on the direction and region of bending. This is the first experimental demonstration of bend sensitivity for arthropod setae. Cuspidate setae contain highly sensitive mechanosensory neurons; however, due to the rigid nature of these setae, whether they were bend sensitive or displacement sensitive could not be determined, and they were thus called "tactile neurons." Bend-sensitive neurons, but not displacement-sensitive neurons or tactile neurons, showed graded responses to changes in osmolarity. The osmosensitivity of these neurons could mediate behavioral responses to changes in the osmolarity of seawater or food.},
  author       = {Garm, Anders and Derby, CD and Hoeg, JT},
  issn         = {0006-3185},
  language     = {eng},
  number       = {3},
  pages        = {195--208},
  publisher    = {Marine Biological Laboratory},
  series       = {Biological Bulletin},
  title        = {Mechanosensory neurons with bend- and osmo-sensitivity in mouthpart setae from the spiny lobster Panulirus argus},
  volume       = {207},
  year         = {2004},
}