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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 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.
What is the relationship between the patellar and femoral region?
The patellar region is DISTAL to the femoral region.
Is the Patellar reflex inhibited or enhanced by voluntary muscle activity in the quadriceps?
The patellar reflex is enhanced by voluntary muscle activity in the quadriceps. When you contract your quadriceps, it stretches the patellar tendon, causing a stronger reflex response when the knee is tapped.
What is the common name of sub patellar bursitis?
The common name for sub patellar bursitis is "knee bursitis."
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.
The patellar knee jerk reflex is an example of?
Patellar reflex is an involuntary, deep tendon and myotatic reflex
What is patellar mobs?
Patellar mobs (mobilizations) are when a physician or therapist moves your knee cap (patella) either up and down or side to side. This is done to encourage proper joint function and enhance mobility.
To what bony structure does the patellar ligament attach?
The patella and anterior tbia attach to the patellar ligament.
