What best describes a central pattern generator?

What best describes a central pattern generator?

• A. A neural circuit that requires continuous sensory input to generate rhythmic activity
• B. A neural region for memory recall
• C. A neural circuit that produces rhythmic motor patterns without requiring continuous sensory input
• D. A hormonal axis governing appetite

Answer: (C)

A central pattern generator is a neural circuit capable of producing rhythmic motor patterns on its own, meaning it can keep a repeating movement going even when sensory input is not present or is reduced. Once this circuit is activated, it can generate actions like walking, swimming, or breathing without needing continuous feedback from the environment. Sensory input and proprioceptive signals can still modulate or refine the rhythm, but they are not required for the pattern to continue. This distinguishes CPGs from circuits that depend on ongoing sensory cues to produce rhythmic activity. For example, spinal circuits can generate stepping patterns in the absence of brain input, illustrating self-sustained rhythmic control. The other options describe memory recall or hormonal regulation, which do not capture the ability to produce rhythmic motor output autonomously.

A central pattern generator is a neural circuit capable of producing rhythmic motor patterns on its own, meaning it can keep a repeating movement going even when sensory input is not present or is reduced. Once this circuit is activated, it can generate actions like walking, swimming, or breathing without needing continuous feedback from the environment. Sensory input and proprioceptive signals can still modulate or refine the rhythm, but they are not required for the pattern to continue. This distinguishes CPGs from circuits that depend on ongoing sensory cues to produce rhythmic activity. For example, spinal circuits can generate stepping patterns in the absence of brain input, illustrating self-sustained rhythmic control. The other options describe memory recall or hormonal regulation, which do not capture the ability to produce rhythmic motor output autonomously.