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.
The synapse, which is usually a chemical synapse, but may be an electrical synapse. In the case of a chemical synapse, or synaptic cleft, chemical messengers called neurotra â¦ nsmitters travel across a very small space between cells, sending a message to change the membrane voltage potential of the post-synaptic cell.he space between neurons is called a synapse; it is where chemical information in the form of neurotransmitters is passed between neurons. Some neurons are connected electric â¦ ally; the spaces between those neurons are called gap junctions. 4 people found this useful.