Modulation of behavior by biogenic amines and peptides in the @entity11061 , XXXX .

@entity11061 @entity935 @entity70618 @entity11879 @entity750 @entity1063
Using the @entity11061 @entity11061 as a model system, we have investigated the effects of potential neuromodulators on freely behaving animals. Of interest is the modulatory effect of a number of drugs on three rhythmic behaviors of the @entity11061 : courtship display (CD) of the male crab, sideways swimming and backward swimming. The drugs tested were @entity70618 , @entity935 , @entity11879 , @entity750 , and @entity1063 . Injection of each drug elicited a unique posture or combination of limb movements. These experiments showed two results pertinent to CD behavior: A posture identical to the CD posture was displayed after @entity935 injection; and rhythmic leg waving similar to CD was evoked by @entity70618 . An unusual combination of flexion and extension of all limbs and movements of some limbs occurred after @entity750 injection. Injection of @entity11879 led to a posture antagonistic to CD posture. The effects of these drugs were concentration- and time-dependent. Injection of @entity935 , @entity11879 , or @entity750 produced effects that were seasonally-dependent, and the influence of @entity70618 proved to be dependent on developmental stage. Quantitative analysis of leg waving movements after @entity70618 injection allowed for comparison of these movements to naturally-occurring behavior.
