PLC Knee Injury. The Posterolateral Complex (PLC) refers to a group of ligaments and tendons that run on the outside of the knee. The PLC is composed of the fibular collateral ligament (FCL), the popliteofibular ligament (PFL), and the tendon of the popliteus muscle. Together these three structures provide stability to the knee with side to side motion and during rotational movements.
The development of the neuromuscular junction requires signaling from both the motor neuron's terminal and the muscle cell's central region. During development, muscle cells produce acetylcholine receptors (AChRs) and express them in the central regions in a process called prepatterning.he neuromuscular junction is the site of the signal exchange. The steps of this process in vertebrates occur as follows:(`) The action potential reaches the axon terminal. (2) Voltage-dependent calcium gates open, allowing calcium to enter the axon terminal.
The Synapse and the Neuromuscular Junction. 1  Each terminal button joins to either another neuron, a gland cell, or a muscle cell. 2  The connection to another neuron, which takes place at a dendrite or on the soma, is termed a synapse. Signals are conducted by the axon from the cell body to the terminal buttons. 2  Signals are transmitted from the terminal buttons to the receiving cell across a synapse (if the receiving cell is a neuron) or a neuromuscular junction (if the receiving cell is a muscle cell).