What is a monosynaptic reflex?
Monosynaptic reflex: ↑ A reflex that only contains one space for an action potential to travel between a sensory and motor neuron. Receptor: ↑ A part of skin or muscle that senses a stimulus. Polysynaptic reflex: ↑ A complex reflex that contains many connections between neurons.
Which is an example of a monosynaptic reflex?
The perfect example of the monosynaptic reflex is the knee-jerk or the patellar reflex. Then, neuron II of the patellar reflex, which is in the lumbar segments of the spinal cord, sends the efferent signal through its axon to the quadriceps muscle to contract.
What happens in a withdrawal reflex?
This automatic response is known as the withdrawal reflex defined as the automatic withdrawal of a limb from a painful stimulus. Specifically, the withdrawal reflex mediates the flexion of the limb that comes into contact with the noxious stimuli; it also inhibits the extensors of that same limb.
What are the different types of reflexes?
There are two types of reflex arcs:the autonomic reflex arc, affecting inner organs, and the somatic reflex arc, affecting muscles.
What are visceral reflexes?
Visceral reflexes involve a glandular or non-skeletal muscular response carried out in internal organs such as the heart, blood vessels, or structures of the GI tract. They utilize neurons of the autonomic nervous system to elicit their actions.
Is crossed extensor reflex Monosynaptic?
A monosynaptic pathway causes the quadriceps muscle to contract, while polysynaptic pathway triggers a crossed extensor reflex. A monosynaptic pathway causes the quadriceps muscle to contract, while a polysynaptic pathway causes the antagonist muscle to relax.
What is monosynaptic reflex explain it with suitable example with the help of diagram?
monosynaptic reflex A simple reflex that involves transmission of information from a sensory neuron to the appropriate motor neuron across a single synapse in the spinal cord. The knee-jerk reflex action is an example of a monosynaptic reflex (see stretch reflex).
What kind of reflex is withdrawal reflex?
The withdrawal reflex is a spinal reflex intended to protect the body from damaging stimuli. It is a polysynaptic reflex, causing stimulation of sensory, association, and motor neurons.
How does a painful stimulus elicits an automatic response from the nervous system?
When a dangerously hot or cold object comes into contact with the skin, it triggers a response from the body’s autonomic nervous system (ANS), which manages bodily functions that are beyond our conscious control, such as breathing and digestion. …
What is a reflex in psychology?
n. any of a number of automatic, unlearned, relatively fixed responses to stimuli that do not require conscious effort and that often involve a faster response than might be possible if a conscious evaluation of the input were required. An example is the pupillary reflex.
What are 4 types of reflexes?
In our discussion we will examine four major reflexes that are integrated within the spinal cord: the stretch reflex, the Golgi tendon reflex, the withdrawal reflex and the crossed extensor reflex.
Which is an example of a visceral reflex?
Some examples of visceral reflexes are sneezing, coughing, swallowing, vomiting, dilation of the pupil, contraction of smooth muscles of the hollow organs in different organ systems.
Are reflexes monosynaptic or polysynaptic?
Some reflexes are monosynaptic, such as the stretch reflex. Other reflex pathways are polysynaptic, and include interneurones that connect the sensory and effector neurones. The simplest reflex arc is the monosynaptic (stretch) reflex.
Is the disynaptic reflex excitatory or inhibitory?
The primary afferents use glutamate as their main, excitatory, transmitter, and the interneurone in the disynaptic reflex releases an inhibitory transmitter such as glycine. This reflex has some alternative names: the ‘inverse myotatic reflex’, or ‘autogenic inhibition’. Disynaptic Reflexes: Reciprocal Inhibition
What is the physiology of reflexes?
Physiology of Reflexes Reflex movements are movements initiated by sensory receptors, which, by having synaptic contacts within the spinal cord, are a basic level of regulation of muscles or glands. The Spinal Reflexes are the most basic of all reflexes, but other parts of the central nervous system also contain reflex pathways.
What are the different types of reflexes in the spinal cord?
Spinal Reflex Pathways. Monosynaptic Reflex. The simplest reflex arc: the monosynaptic (stretch) reflex. On entering the spinal cord the sensory axons often divide to form axon collaterals. So all axons distribute their information to multiple groups of post-synaptic cells.