Can a reflex inhibit a stimulus?

Can a reflex inhibit a stimulus?

Can a reflex inhibit a stimulus?

An interruption in a specific part of the pathway of the withdrawal reflex can potentially prevent it from occurring properly; this reflex is a protective mechanism against tissue-damaging stimuli. A loss of function of sensory neurons may prevent the withdrawal reflex from being initiated.

What is the stimulus in a reflex action?

Reflex arcs Receptor in the skin detects a stimulus (the change in temperature). Sensory neuron sends electrical impulses to a relay neuron, which is located in the spinal cord of the CNS. Relay neurons connect sensory neurons to motor neurons. Motor neuron sends electrical impulses to an effector.

What is inhibitory reflex?

the reduction or prevention of a reflex because an incompatible reflex is occurring or has just occurred.

How is reflex inhibited?

Thus, when a muscle spindle is stretched and the stretch reflex is activated, the opposing muscle group must be inhibited to prevent it from working against the resulting contraction of the homonymous muscle (Figure 2.2). This inhibition is accomplished by an inhibitory interneuron in the spinal cord.

What happens when you have no reflex actions?

When reflex responses are absent this could be a clue that the spinal cord, nerve root, peripheral nerve, or muscle has been damaged. When reflex response is abnormal, it may be due to the disruption of the sensory (feeling) or motor (movement) nerves or both.

Which is responsible for the inhibition of antagonistic contraction during a reflex response?

Sensory fibers also synapse with interneurons that inhibit motor neurons controlling antagonistic muscles.

What is reflex action controlled by?

the spinal cord
Reflex actions are under the control of the spinal cord.

How does the stimulus reach the muscle?

Sensory neurons transmit information from sensory receptors to the central nervous system (CNS) Relay neurons (interneurons) transmit information within the CNS as part of the decision-making process. Motor neurons transmit information from the CNS to effectors (muscles or glands), in order to initiate a response.

What is muscular inhibition?

Muscle inhibition is reflexive response following result of injury, described by the inability to recruit motor units of any muscle surrounding an injured joint [50]. Clinically, it presents as muscle weakness; however is a result of altered afferent stimuli from receptors to the central nervous system (CNS) [50].

Which stimulus causes a muscle to reflexively contract?

A sudden stretch, such as tapping the Achilles’ tendon, causes a reflex contraction in the muscle as the spindles sense the stretch and send an action potential to the motor neurons which then cause the muscle to contract; this particular reflex causes a contraction in the soleus-gastrocnemius group of muscles.