What is that? /Definition Acetylcholine is one of the most important neurotransmitters both in humans and in many other organisms. In fact, acetylcholine already occurs in unicellular organisms and is considered to be a very old substance in the history of development. At the same time, it is the longest known neurotransmitter (it was first … Acetylcholine
Anatomy The spine of most people is composed of 24 freely moving vertebrae, which in turn are flexibly connected to each other by a total of 23 intervertebral discs. The deeper lying vertebrae of the coccyx and sacrum have grown together as bones. From person to person, however, deviations can occur. Although the vertebrae of … Nerve Root
Function As already described, two nerve tracts originate from the spinal cord on each side and level, which only after a short time unite to form a spinal nerve. These rear and front nerve roots carry different qualities of nerve fibers. While the front nerve roots send motor impulses from the brain to the muscles, … Function | Nerve Root
Nerve root irritation Irritation of the spinal nerve roots can be caused by various pathological processes in the area of origin of the spinal nerves. In most cases, however, degenerative, i.e. wear- and age-related changes in the spinal column can be identified as the cause of nerve root irritation. This includes for example foraminal stenosis, … Nerve root irritation | Nerve Root
Slipped disc In the course of life many people suffer from serious back pain. However, only about 5% of these complaints are due to a herniated disc (disc prolapse or just prolapse). Nevertheless, the herniated disc is the most common cause of radical pain. The most frequent occurrence of a herniated disc occurs between the … Slipped disc | Nerve Root
L5 syndrome If the spinal nerve roots at the level of the fifth lumbar vertebra (L5) are affected by irritation, a characteristic complex of symptoms results, which is also known as L5 syndrome. The L5 syndrome is mainly characterized by pain along the back of the thigh, the outside of the knee, the lower leg … L5 syndrome | Nerve Root
Cervical spine The spinal nerves, which originate from the spinal cord segment at the level of the seventh cervical vertebra (C7), are involved in the formation of a nerve plexus known as the brachial plexus. From this plexus emerge sensory and motor nerve fibers for the arms, shoulders and chest. A herniated disc at this … Cervical spine | Nerve Root
Definition A synapse is the contact point between two nerve cells. It is used to transmit a stimulus from one neuron to another. A synapse can also exist between neuron and muscle cell or sensory cell and gland. There are two fundamentally different types of synapses, the electrical (gap junction) and the chemical. Each of … Synapses
Synaptic cleft The synaptic cleft is a part of the synapse and names the area between two consecutive nerve cells. This is where signal transmission with action potentials takes place. If the synapse is a motor end plate, i.e. the transition between nerve cells and the synaptic cleft, the signal transmission takes place.and muscle cell … Synaptic cleft | Synapses
Synonym axial cyinder, Neurit General information The term axon is used to describe the tubular extension of a nerve cell that transmits impulses originating from the nerve cell body to the farthest reaches. Within the axon is a fluid, the axoplasm, which corresponds to the cell content (cytoplasm) of other cells. Here are cell organelles … Axon
Tasks An axon fulfils two important tasks: First, it is there to transmit the electrical impulses generated in the nerve cell body to the next nerve cell or to the target structure (muscle or gland cell). – In addition, some substances are transported along certain structures through the axon. This process, known as axonal transport, … Tasks | Axon
The axon mound is part of a nerve cell. A nerve cell, also known as a neuron, has the task of transmitting signals that are sent to it to the next nerve cell or to a muscle. Structure The nerve cell roughly consists of three sections. The central part is the cell body, the so-called … Axon Hill
