John Dewey. The Reflex Arc Concept in Psychology.
Describe reflex action and reflex arc. Answers: REFLEX ACTION: A reflex, or reflex action, is an involuntary and nearly instantaneous movement in response to a stimulus. A reflex is made possible by neural pathways called reflex arcs which can act on an impulse before that impulse reaches the brain. Examples include When light acts as a stimulus, the pupil of the eye changes in size. Coughing.
Reflex Arc. and Physical Effects on Patellar Reflex May 8, 2014 Introduction The purpose of this experiment was to monitor our body’s reaction to stimulation and see how our nervous system, specifically the somatic nervous system can affect the patellar reflex. “The patellar reflex, also known as the knee jerk reflex is an example of a simple two neuron, monosynaptic reflex arc”(Marieb.
I have limited the discussion here to the withdrawal reflex you asked about and another basic spinal reflex arc as an illustration of principle. There are many other, mostly more complex reflex arcs that are beyond the scope of this answer, but I highly recommend checking out a neuroanatomy or neurophysiology textbook such as the one I've listed below if you'd like more information. Note 1.
REFLEX ARC ANATOMY A receptor, a sensory neuron, a motor neuron, The motor neuron’s innervation of the peripheral nervous system, and at least one association neuron from the central nervous system are the ingredients to a conduction passageway of the reflex arc.The reflex arc is ingeniously designed to help keep the body safe, as it is the mechanism that permits immediate responses to.
Define the terms reflex and spinal reflex and identify the components of a reflex arc. A reflex is an automatic response to a stimulus produced by a reflex arc. It occurs without conscious thought. Reflexes are homeostatic. A spinal reflex is any reflex action mediated through the center of the spinal cord. A reflex arc is the nerve pathway involved in a reflex action including at its simplest.
The contraction of the pupils of the eyes when exposed to bright light is a perfect example of a reflex action. Normally, the brain coordinates a response to any stimulus via the spinal cord and the central nervous system. In certain circumstances, the brain is bypassed for a very quick response. A response takes longer when the brain, the nerves and the spinal cord are involved. All reflex.
A reflex arc refers to the neural pathway that a nerve impulse follows. The reflex arc typically consists of five components (3): 1. The receptor at the end of a sensory neuron reacts to a stimulus. 2. The sensory (afferent) neuron conducts nerve impulses along an afferent pathway towards the central nervous system (CNS). 3. The integration center consists of one or more synapses in the CNS. 4.