Purpose: To Test for the presence of shoulder instability. Test position: Sitting or standing. Performing the Test: The examiner grasps the wrist of the patient's elbow and pulls the arm distally. Observation is made of the amount of sulcus (space between the acromion process and humeral head) that is present with the distal arm pull. A positive test is considered for multidirectional instability if 1-2 cm of sulcus is noted. Diagnostic Accuracy: Unknown.
> Synapsis (also called syndesis) is the pairing of two homologous chromosomes that occurs during meiosis. It allows matching-up of homologous pairs prior to their segregation, and possible chromosomal crossover between them. Synapsis takes place during prophase I of meiosis.
Synapse. Definition. noun, plural: synapses. A specialized structure or junction that allows cell to cell communication. verb. (1) To form a synapse. (2) To undergo synapsis. Supplement. A biological synapse involving neurons can be:(1) Chemical synapse: the junction between neurons such that the nerve impulse is transmitted from a neuron to another neuron or to a muscle cell or gland cell. (2) Electrical synapse: the gap junction between two apposed neurons that allows faster nerve transmission.Recently, a biological synapse not involving a neuron is found to exist. The junction between a lymphocyte and an antigen-presenting cell is referred to as immunological synapse.ynapse. Definition. noun, plural: synapses. A specialized structure or junction that allows cell to cell communication. verb. (1) To form a synapse. (2) To undergo synapsis. Supplement. A biological synapse involving neurons can be: