[Abstract Title]. - Society for Neuroscience

Variation in sensory pathways allows organisms to monitor their environment, integrate sensory
information from multiple sensory sources, and in turn, respond accordingly due to refined
integration of information. Most invertebrates possess chemosensory neurons which allow for
identification of the many chemicals in the environment and thus are able to behave differentially
between chemical compounds based upon the sensory pathway stimulated (i.e., attractive and/or
repellant). Current literature shows this is particularly true for decapod crustaceans in detecting
chemical signals, especially in the cephalic and thoracic appendages. Crayfish are decapod
crustaceans that rely on visual, as well as chemical cues in the environment. While behavior is
often used as a bio-index for awareness to a changing environment, previous studies have shown
that many organisms may show no outward behavioral change while internally readying (i.e.,
autonomic response) themselves for an impending predator attack. Thus, behavior alone often
excludes “flight or flight” internal readiness changes and may conclude a lack of environmental
awareness. To understand this sympathetic-like response, we examine the autonomic response
(HR, heart rate and VR, ventilation rate) in crayfish, Procambarus clarkii, during chemical
introduction, as well as establish chemical and/or modality sensitivities by targeting multiple
sensory modalities. Preliminary findings suggest crayfish which show no behavioral response do
in fact show an internal response through changes in HR and VR. In addition, crayfish show an
increase in HR with attractant chemical introduction (i.e., cysteine, blood water) suggesting a
natural response to a possible food source, while showing a more pronounced response to
possible repellent compounds. Future research will include the examination antennule flicking as
a possible quantitative measure of chemosensory reception for the multiple sensory modalities.
Disclosures: M.M. Robinson , None; S.M. Bierbower, None; R.L. Cooper, None; T. Spence,
None; T. McLaurine, None.
Poster
237. Synaptic Integration II
Time: Sunday, November 16, 2008, 1:00 pm - 5:00 pm
Program#/Poster#: 237.6/D31
Topic: B.07.c. Synaptic integration
Support: KAKENHI(15082207)
Title: Intracellular Ca 2+ elevation accompanying NMDA receptor-mediated plateau potential in
hippocampal CA1 pyramidal neurons
Authors: S. KODAMA 1 , S. WATANABE 1 , T. SUZUKI 2 , T. IZUMI 1 , *H. BABA 3 , M.
INOUE 1 , H. MIYAKAWA 1 ;
1 Cell. Neurophysiol., Tokyo Univ. of Pharm. and Life Sci., Hachiouji, Tokyo, Japan; 2 Dept. of