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What nerve is carrying the afferent and efferent impulses during the patellar reflex?
Wiki User
∙ 12y ago
The nerves innervate the quadriceps. The afferent nerves are the muscle spindles and the efferent are the motor neurons.
Wiki User
∙ 10y ago
Wiki User
∙ 12y agofemoral nerve
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What occur during reflex arc?
Definitions: 1. afferent neuron - sensory nerve 2. efferent neuron - motor nerve 3. monosynaptic - see below There are different types of reflexes but the simplest type is a monosynaptic reflex. This means the afferent neurons connect directly to the efferent neurons. For example the knee jerk reflex is a monosynaptic reflex: 1. The patellar tendon is stretched. 2. The afferent neuron (which has stretch sensors) send a signal up to the spinal cord. 3. In the spinal cord at the synapse. The electrical signal is changed to a chemical signal. 4. Chemical messengers travel across the synapse and stimulate the efferent neuron. 5. The efferent neuron changes these signals into electrical signals which travel down to the quadriceps muscle. 6. There is another synapse connecting the nerve to the muscle. chemical messengers travel across the synapse and stimulate the muscle to contract.
What is patellar fx?
Patellar fx is shorthand for patellar fracture, or a broken kneecap.
Which ligament of the knee initiates the knee-jerk reflex?
The patellar tendon, just underneath the kneecap
What is a patellar?
Patellar means related to the patella bone. Patella is a sesamoid bone in the front of the knee joint. Terms are used like pre-pattellar or post-patellar. Pre-patellar means proximal to the patella or post patellar means distal to the patella bone. Patellar tendon or patellar dislocation. The expert in the English grammar should comment on the correctness of the term, please.
What is the relationship between the patellar and femoral region?
The patellar region is DISTAL to the femoral region.
Is the patellar reflex more or less vigorous after exercise?
The patellar reflex is more vigorous after exercise.
Is the Patellar reflex inhibited or enhanced by voluntary muscle activity in the quadriceps?
The patellar reflex is inhibited
What is the effector involved the patellar reflex?
In order to provoke the patellar reflex one must strike the patellar tendon with a tendon hammer (and only a tendon hammer, striking with an ordinary hammer is ill-advised). In other words, strike the region immediately below the patella.
Where is the patellar region?
knee
Is a patellar reflex autonomic?
no
What nerve is tested for patellar reflex?
The Femoral nerve. Wikipedia: Striking the patellar tendon with a tendon hammer just below the patella stretches the quadriceps muscles in the thigh. This stimulates stretch sensory receptors (i.e. muscle spindles) to trigger an afferent impulse in a sensory Ia-nerve fiber of the femoral nerve which synapses (without interneurones) at the level of L4 in the spinal cord, completely independent of higher centres.
The patellar knee jerk reflex is an example of?
Patellar reflex is an involuntary, deep tendon and myotatic reflex
