Reflex Arc

A reflex arc is a neural pathway that controls an action reflex. In higher animals, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. This characteristic allows reflex actions to occur relatively quickly by activating spinal motor neurons without the delay of routing signals through the brain, although the brain will receive sensory input while the reflex action occurs.

There are two types of reflex arc: autonomic reflex arc (affecting inner organs) and somatic reflex arc (affecting muscles).

Read more about Reflex Arc:  Monosynaptic Vs. Polysynaptic, The Patellar Reflex (knee Jerk)

Other articles related to "reflex arc, reflex":

John Dewey - Functional Psychology
... In Dewey's article "The Reflex Arc Concept in Psychology" which appeared in Psychological Review in 1896, he reasons against the traditional stimulus-response understanding of the reflex arc in. 1899, and was the author of an 1896 article on the reflex arc which is now considered a basis of American functional psychology ...
Reflex Arc - The Patellar Reflex (knee Jerk)
... When the patellar tendon is tapped just below the knee, the patellar reflex is initiated and the lower leg kicks forward (via contraction of the quadriceps) ... In lower animals reflex interneurons do not necessarily reside in the spinal cord, for example as in the lateral giant neuron of crayfish ...
Gag Reflex - Reflex Arc
... In a reflex arc, a series of physiological steps occur very rapidly to produce a reflex ... In the case of the pharyngeal reflex, The sensory limb is mediated predominantly by CNIX (glossopharyngeal nerve), the motor limb by CN X (vagus nerve) ... The gag reflex involves a brisk and brief elevation of the soft palate and bilateral contraction of pharyngeal muscles evoked by touching the posterior pharyngeal wall ...

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