The autonomic nervous system is the part of the nervous system that controls involuntary actions such as heart rate or narrowing of blood vessels. Disorders in this system can cause serious problems, including: blood pressure problems, heart problems, breathing and swallowing problems, erectile dysfunction in men
The locomotor system, like the sensory system, consists of a complex network of structures and pathways at all levels of the nervous system. Motor function results from dynamic and complex communication between muscles and nerve sections. Spinal motor neurons are part of the motor system. Any lesion in any of these parts causes movement disorders, the severity of which depends on the area of injury and its extent. Of course, the sensory parts of the nervous system also participate in motor action. Although they are not part of the locomotor system, locomotor control is the result of the coordinated and reciprocal action of the sensory and motor parts of the nervous system.
Table of contents
1 components of the locomotor system
2 final joint path and motor device
Components of the locomotor system
The most important nervous parts of the locomotor system are:
Cortex or cerebral cortex. Three motor areas in the cerebral cortex affect motor control, which are:
1- Primary motor area
2. Pre-movement area or secondary movement area
3. Complementary movement area
-Spinal spinal pathways that include:
1. Spinal cortical pathway
2. The cortical path of the spinal cord
3. Extra-pyramidal ways
Acne and related pathways
-Regular complexes and related pathways
Spinal cord or spinal cord
Inferior motor neurons
The final joint path and locomotor system
The ultimate common pathway proposed by Sherrington is the part of the locomotor system or neuromuscular system that is involved in muscle contraction and locomotor function as an effective environmental mechanism.
The components of the final common path are:
The lower alpha motor neuron is called the “alpha motor neuron”. This neuron innervates muscle fibers in an area called neuromuscular contact. Each alpha motor neuron delivers a specific number of muscle fibers that The set is called the unit of motion.
Muscle unit. The set of muscle fibers that are innervated by alpha motor neurons is called a muscle unit.
Intermediate neurons in the anterior horn of the spinal cord.
In large muscles (such as the anterior tibialis), a motor unit contains 1000 or more muscle fibers, and in smaller muscles (such as the lumbar), the motor unit contains 10 muscle fibers..
When the nerve current reaches the alpha motor neurons, this message is transmitted to the muscle unit in the area of neuromuscular contact, and thus, if the effective motor units are stimulated, skeletal muscle contraction and resulting movement occurs.