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reflex arc
This term is a technical biological descriptor used primarily in anatomy, physiology, and neurology. It describes a specific structural sequence of neurons that allows for an immediate response to a stimulus without the need for conscious processing by the brain. Because it refers to a physical pathway, it is used in clinical settings to diagnose nerve damage or spinal cord integrity.
In a medical context, the term is strictly descriptive of the biological circuit. It should not be confused with the "reflex" itself, which is the resulting action; the "arc" refers specifically to the anatomical route the impulse travels from the receptor to the effector.
Meanings
Examples
The reflex arc allows the body to react to danger before the brain even processes the pain.
Wait, does the signal in a reflex arc always pass through the spinal cord?
A damaged reflex arc can lead to a loss of protective responses to heat or pain.
The teacher drew a diagram of the reflex arc on the whiteboard to explain the pathway.
I wonder if this specific nerve injury has interrupted the reflex arc entirely.
The speed of a reflex arc is essential for avoiding immediate physical harm.
Most simple reflex arcs bypass the conscious mind to save precious milliseconds.
Let us examine how the sensory neuron initiates the reflex arc.
The patient showed a diminished response, suggesting a malfunction in the reflex arc.
The patient showed a diminished response, suggesting a malfunction in the reflex arc.