During the Patellar Reflex What Structure Acts as the Effector?

Maya Lin-Takahashi
Maya Lin-Takahashi
• • 6 min read

What Is the Patellar Reflex? a Monosynaptic Reflex Extension of the Leg Resulting from a Sharp Tap on the Patellar Tendon Patellar Tendon the Patellar Tendon...

During the Patellar Reflex What Structure Acts as the Effector?

What is the patellar reflex? A monosynaptic reflex extension of the leg resulting from a sharp tap on the patellar tendon

patellar tendon
The patellar tendon is a strong, flat ligament, which originates on the apex of the patella distally and adjoining margins of the patella and the rough depression on its posterior surface; below, it inserts on the tuberosity of the tibia; its superficial fibers are continuous over the front of the patella with those of ...
› wiki › Patellar_tendon
. It helps maintain and upright position. It's effector muscles are located in the quadriceps femoris
quadriceps femoris
All four quadriceps are powerful extensors of the knee joint. They are crucial in walking, running, jumping and squatting. Because the rectus femoris attaches to the ilium, it is also a flexor of the hip. This action is also crucial to walking or running, as it swings the leg forward into the ensuing step.
› wiki › Quadriceps_femoris_muscle
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Which part is the effector of the reflex action?

Reflex arcs

Sensory neuron sends electrical impulses to a relay neuron, which is located in the spinal cord of the CNS. Relay neurons connect sensory neurons to motor neurons. Motor neuron sends electrical impulses to an effector. Effector produces a response (muscle contracts to move hand away).

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What are the major events that occur in the knee-jerk reflex?

The quadriceps femoris is stretched, stimulating stretch receptors (muscle spindles) within the muscle. As a result, impulses pass along sensory neurons into the spinal cord and synapse with a motor neuron.

Maya Lin-Takahashi

Maya Lin-Takahashi

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Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.