What is the efferent nerve for patellar reflex?
femoral nerve
The patellar tendon reflex tests the function of the femoral nerve and spinal cord segments L2-L4. The absence or decrease of this reflex is known as Westphal’s sign.
What nerve is carrying the afferent and efferent impulses in patellar reflex?
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| Question | Answer |
|---|---|
| What nerve is carrying the afferent and efferent impulses in the patellar stretch reflex? | femoral nerve |
| Cross-extensor reflex | more complex than the stretch reflex. It consists of a flexor, or withdrawal, reflex follow by extension of the opposite limb. |
What is the receptor in the knee jerk reflex?
In the knee jerk reflex effector and receptor are motor endplate and muscle spindle respectively.
Which part of the reflex hammer was used for the patellar reflex?
Which part of the reflex hammer should you use to test the patellar reflex? The pointed rubber side, the broad rubber side.
What type of reflex is the patellar reflex quizlet?
The patellar (knee-jerk) reflex is an example of what type of reflex? It is an example of a stretch reflex.
What nerve carries afferent and efferent impulses?
Due to their function, nerve fibers which carry afferent impulses are known as afferent nerves or sensory nerves, and those nerve fibers which carry efferent impulses are known as efferent nerves or motor nerves.
Is the patellar reflex somatic or autonomic?
Autonomic Reflexes Activity 1- Patellar reflex The patellar tendon reflex or knee-jerk reflex is a monosynaptic stretch reflex that assesses the nervous tissue between (and including) the L2 and L4 segments. It can be done by tapping the patellar ligament (just below the knee) with a reflex hammer.
Is interneurons involved in knee-jerk reflex?
The monosynaptic knee-jerk reflex skips the interneuron, so it involves the sensor, sensory neuron, motor neuron, and muscle fiber (Figure 2).
What is the purpose of the patellar reflex quizlet?
The patellar reflux involves the rapid contraction of QUADRICEPS FEMORIS when a stretched patellar ligament is tapped. The result is rapid knee extension. The reflex tests the function of the L4 segment of the spinal cord and the corresponding nerve roots.
Why is the patellar stretch reflex so important?
The patellar stretch reflex is beneficial because it can prevent injury. When the stretch occurs, muscle spindles which are sensory receptors, detect the change in the length of the tissue. They send signals through the sensory neurons to the spinal cord and interneurons which direct the signal to motor neurons.
What happens to afferent and efferent nerve fibers?
If sensory (= afferent) fibers are affected, you and your brain won’t be notified by the sensory organs, e.g. if somebody strikes your leg. In fact, mostly a combination of efferent and afferent fibers is damaged after a spinal cord injury. But there is more …
Is the patellar reflex a monosynaptic reflex arc?
The patellar reflex is a clinical and classic example of the monosynaptic reflex arc. There is no interneuron. Instead the bipolar sensory neuron synapses directly on a motor neuron in the spinal cord. (Ganong, 2005)
What happens when you tap the patellar tendon?
Tapping the patellar tendon stretches the quadriceps muscle and causes the sensory receptor of the muscle, called a spindle fiber, to send a signal along the afferent neuron to the spinal cord. This causes the efferent neuron to return a signal to the quadriceps muscle to contract and lift the lower leg. What is the patellar reflex test used for?