Figure 11 - Schematic representations of the swallowing central pattern generator (CPG).

a: The swallowing (Sw) CPG may be a dedicated circuit with neurons subserving only this function. This CPG has connections with others CPGs, such as those involved in respiration, mastication, etc., to ensure functional interactions under physiologic conditions. b: The swallowing CPG may be a reorganizing circuit consisting of pools of flexible neurons, that is, neurons that can function in several CPGs involved in the organization of various kinds of motor behaviors. c: Alternatively, it is possible that the swallowing CPG may be formed temporarily by neurons belonging previously to other CPGs. Following swallowing input, these neurons contribute to the newly formed swallowing CPG. (Source: Adapted from Dickinson and Moulins¹⁶⁸ and Jean.³, with permission)