The ligament of the ankle that connects the lateral talus and fibular malleolus, preventing anterior displacement of the talus in the mortise. This ligament is injured with an excessive inversion and plantar flexion motion (supination) and is the most commonly injured ligament of the ankle.eriodontal ligament the fibrous connective tissue that surrounds the root of a tooth, separating it from and attaching it to the alveolar bone, and serving to hold the tooth in its socket. It extends from the base of the gingival mucosa to the fundus of the bony socket.
This gap between the two cells is called a synapse. Impulses are carried across a synapse by chemical messengers called neurotransmitters. Approximately 30 different neurotransmitters have been identified, but they all do one of two things: Stimulate the action potential in the next neuron cell.Speed up the impulse.Inhibit the action potential in the next neuron.mpulses move from one nerve cell to another because of a difference in electrical action potential caused by ions inside and outside the cell. The cell membrane is selectively permeable to potassium ions, K + , and highly impermeable to sodium ions, Na + .
The transmission of information is accomplished in two ways: 1  Electrically: the neuron is directly adjacent to other neurons. 2  Chemically: there is a space (the synaptic cleft) between the axon terminus and the adjacent neuron.As the action potential reaches the end of the axon, a chemical is released that travels across the synaptic cleft to the next neuron to alter its electric potential.With very few exceptions, mammalian organisms use chemical means to transmit information. The vesicle merges with the presynaptic membrane. 2  The presynaptic membrane and vesicle now forms a continuous membrane, so that the neurotransmitter is released into the synaptic cleft. 3  This process is called exocytosis.