PT  - JOURNAL ARTICLE
AU  - D Zecevic
AU  - JY Wu
AU  - LB Cohen
AU  - JA London
AU  - HP Hopp
AU  - CX Falk
TI  - Hundreds of neurons in the Aplysia abdominal ganglion are active during the gill-withdrawal reflex
AID  - 10.1523/JNEUROSCI.09-10-03681.1989
DP  - 1989 Oct 01
TA  - The Journal of Neuroscience
PG  - 3681--3689
VI  - 9
IP  - 10
4099  - http://www.jneurosci.org/content/9/10/3681.short
4100  - http://www.jneurosci.org/content/9/10/3681.full
SO  - J. Neurosci.1989 Oct 01; 9
AB  - A combination of optical and electrode recording methods was used to obtain an overview of the neuron activity in the Aplysia abdominal ganglion in response to a light touch to the siphon skin. Spike activity was detected in up to 150 different neurons. Habituation and sensitization of the gill-withdrawal reflex was accompanied by large changes in the number of activated neurons. It is likely that these recordings are incomplete; the actual number of activated neurons is estimated to be about 300 in the acutely sensitized preparation. While we presume that not all 300 of these neurons are involved in the gill- withdrawal reflex, the number of neurons is so large that it may be difficult to determine the role of each activated neuron with presently available experimental tools.