Interaction between licking and swallowing in the drinking rat.

Area of Science:

• Neuroscience
• Animal Behavior
• Physiology

Background:

• Licking behavior in rodents is a complex motor sequence.
• Periodic interruptions in licking suggest discrete events occurring during drinking.

Purpose of the Study:

• To investigate the nature of the brief interruptions during rat licking behavior.
• To test the hypothesis that oral water volume triggers swallowing during drinking.

Main Methods:

• Behavioral observation of rat licking patterns.
• Electrophysiological recordings during drinking.
• Manipulation of water flow rate during licking tasks.

Main Results:

• Licking behavior was interrupted for approximately 20 milliseconds.
• These interruptions were identified as swallowing events.
• Altering the flow rate of water did not affect the initiation of swallowing.

Conclusions:

• Swallowing during licking behavior is a rapid, periodic event.
• The volume of water accumulated in the oral cavity is not the primary determinant for swallowing initiation.
• Further research is needed to identify the precise mechanisms controlling swallowing during drinking.