For example, this reflex occurs is when a person is standing in an upright position then begins to lean on one side. … Some of the stretch reflexes are
jaw jerk reflex
, biceps reflex, brachioradialis reflex, triceps reflex, patellar reflex, and ankle jerk reflex. Synonyms: myotatic reflex.
What are the stretch reflexes?
The stretch reflex (myotatic reflex), or more accurately “muscle stretch reflex”, is
a muscle contraction in response to stretching within the muscle
. The reflex functions to maintain the muscle at a constant length. … When a muscle lengthens, the muscle spindle is stretched and its nerve activity increases.
Which of the following is an example of the stretch reflex?
The knee-jerk reflex
is a great example of the stretch reflex. When the doctor taps your patellar tendon just below your knee, it stretches your patellar tendon, your quadriceps tendon, and your quadriceps muscles.
What is a simple stretch reflex?
The stretch reflex is also referred to as the deep tendon reflex or myotatic reflex. It is a
simple pre-programmed response by the human body in response to the muscle being passively stretched
e.g. by a tendon hammer, or a sudden change in the ground surface.
What is the function of the stretch reflex in everyday life?
The stretch reflex is very important in posture. It
helps maintain proper posturing
because a slight lean to either side causes a stretch in the spinal, hip and leg muscles to the other side, which is quickly countered by the stretch reflex. This is a constant process of adjusting and maintaining.
What are the two types of stretches?
Stretches are either dynamic (meaning they involve motion) or static (meaning they involve no motion). Dynamic stretches affect dynamic flexibility and static stretches affect static flexibility (and dynamic flexibility to some degree). The different types of stretching are:
ballistic stretching
.
What is the difference between stretch and tendon reflex?
Contrast to stretch reflex
The stretch reflex operates as a feedback mechanism to control muscle length by causing muscle contraction. In contrast, the tendon reflex operates as
a negative feedback mechanism to control muscle tension
. … Like the stretch reflex, the tendon reflex is ipsilateral.
What are the steps in a stretch reflex?
Stretch Reflex. When
a muscle is stretched (1), muscle spindles (2) send information to the spinal cord (3) where it synapses on motor neuron of the same muscle
(4) causing it to contract (5). At the same time, stimulation of an inhibitory interneuron (6) prevents contraction of the antagonistic muscle (7 and 8).
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 is the most basic reflex arc?
The simplest arrangement of a reflex arc consists of
the receptor
, an interneuron (or adjustor), and an effector; together, these units form a functional group. Sensory cells carry input from the receptor (afferent impulses) to a central interneuron, which makes contact with a motor neuron.
What are the major components of a stretch reflex?
- A receptor – muscle spindle.
- An afferent fibre – muscle spindle afferent.
- An integration centre – lamina IX of spinal cord.
- An efferent fibre – α-motoneurones.
- An effector – muscle.
What is a tendon reflex?
The tendon reflex is
a short-latency reflex
, while the stretch reflex is a long-latency reflex. … Within the muscle spindle, the gamma motor neuron cause tightening or relaxing of intrafusal muscle fibers to regulate the sensitivity of the muscle spindle and the reflex’s response. It is mediated by acetylcholine.
What is a Polysynaptic reflex?
Any reflex with more than one synapse
(1), not counting the synapse between neuron and muscle, and hence involving one or more interneurons. In humans, all reflexes except stretch reflexes are polysynaptic.
What do stretch receptors do?
muscle systems
…has important sensory structures called stretch receptors, which
monitor the state of the muscle and return the information to the central nervous system
. Stretch receptors are sensitive to the velocity of the movement of the muscle and the change in length of the muscle.
How does myotatic reflex work?
The myotatic reflex is the “knee-jerk” reflex in which
a muscle contracts in direct response to its stretch
. It is typically elicited by tapping on the tendon of a muscle, which deforms the tendon and stretches the muscle.
What happens to your brain when you stretch?
When you stretch, your
body releases chemicals called endorphins
. These endorphins interact with the receptors in your brain that reduce your perception of pain. Endorphins also trigger a positive feeling in the body, a “high” if you will.
