The term âshoulder instabilityâ is used to refer to the inability to maintain the humeral head in the glenoid fossa.The ligamentous and muscle structures around the glenohumeral joint, under non-pathological conditions, create a balanced net joint reaction force. The relevant structures are listed below.
Definition of synapse. : the point at which a nervous impulse passes from one neuron to another.
Synapse. At a link, called a synapse, between neurons, the two neurons do not actually touch. They are separated by a gap 10,000 times thinner than a strand of hair. Nerve signals cross this gap in the form of chemicals, then carry on as electrical pulses again.