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 Synapse. The gap between the axon of one nerve cell and the dendrite of another nerve cell is called the synapse. Synapses are the space into which neurotransmitters aâ¦re released from the axon to act on the dendrite, and thus transmit a signal between neurons.