According to, a "synaptic knob" is formed by each axonal end branch adjacent to where the synapse and a tiny cleft are located. A neurotransmitter is released into the synapse from the vesicles as a nerve reaches... More »

The function of a synaptic knob is to change the action potential that is carried by axons into a chemical message. The chemical message then interacts with the recipient neuron or effector. This process is called synapt... More »

A monosynaptic reflex has only one synapse in between an outgoing motor response and an incoming sensory; a good example of this would be kicking the leg outward, which is also referred to as a knee jerk. Monosynaptic re... More »

The three parts of a synapse are the presynaptic ending, the synaptic cleft and the postsynaptic ending. An impulse traveling from one nerve cell to another must pass through all three parts to successfully cross the syn... More »

Six extraocular muscles allow the eyeballs to move: the inferior, superior, lateral and medial rectus muscles together with the inferior and superior oblique muscles. Vision Aware adds that the muscles that move the eyeb... More » Science Human Anatomy Muscles

There are three muscles that function on the back of the leg for plantar flexion: the gastrocnemius, the soleus and the plantaris. Plantar flexion involves moving the foot downward toward the ground. More »

Enthesopathy of the hip is an arthritic disorder in the sockets of the hip bone that affects the tendons and ligaments that are attached there. This means that the connections are not working correctly or are damaged in ... More »