Hello, I'm an expert in the field of anatomy and physiology. In the context of human anatomy, the term "junctional" often refers to a "junction" which is a point of connection or transition between different parts of the body, particularly within the nervous system or the cardiovascular system. In the nervous system, there are different types of junctions: 1. Synapses: These are the junctions between neurons, where electrical or chemical signals are transmitted from one neuron to another. 2. Neuromuscular junctions: These are the points where motor neurons meet muscle fibers, allowing the nervous system to control muscle contraction. In the cardiovascular system, "junctional" might refer to: 1. Atrioventricular (AV) junction: This is the area of the heart where the atria and ventricles meet, and it includes the AV node, which is crucial for the electrical conduction of the heart. read more >>

Junctional rhythm describes an abnormal heart rhythm resulting from impulses coming from a locus of tissue in the area of the atrioventricular node, the "junction" between atria and ventricles. ... When this happens, the heart's atrioventricular node takes over as the pacemaker.read more >>