The spinal cord also remains surrounded by certain white substances. There is no spinal cord beyond the first or the second lumbar vertebrae., UMNs (Upper Motor Neurons) and LMNs (Lower Motor Neurons). The LMN motor portions carry forth messages from brain to different parts of the body.LOCATING THE SPINAL CORD The spinal cord starts from the brain stem (the lower portion) and ends at the vertebra called L1 or the first lumbar. THE JOB OF SPINAL CORDThe spinal cord does the linkup job via bundles of neuron or peripheral nerves. The LMNs have entry and exit points at each vertebral stage. Notably, only spinal nerves continue from this stage. Depending on their locations, the vertebrae are christened.
The spinal cord is the communication highway between the brain and other parts of the body. The UMNs are the spinal tract messengers. These nerves are of two types, viz. On the other hand, the LMNs communicate with targeted sections of the body. They carry the stimuli from the brain to other spinal nerves and vice versa.WHAT CONSTITUTES THE SPINAL CORD?The spinal cord is made up of mainly gray matters. Thus, the LMN brings about movement of the muscles. The white portion called tracts is made up of interneuronal axons bundles. Incidentally, the CNS is the main managing unit of our body. From top to bottom, they are identified as C-1 to C-8. From L1, the spinal cord assumes the form of Cauda Equina.
These bones go to construct the back bone or the spinal column. Whereas some tracts carry stimuli or information to the brain (hence identified as ascending) the others convey such information from the brain (therefore called descending).THE VERTEBRASeveral bone rings called vertebrae (singular is vertebra) enfold the spinal cord. The LMN sensory portions convey sensation information from the skin and other organs as well as body parts to the brain. Similarly, the dozen chest vertebrae are known as the Thoracic Vertebrae. The eight Cervical Vertebrae are located in the neck. It extends up to 18 inches. These tracts are the messengers to and from the brain. Take for instance the top rib is attached to OEM Aluminum Zinc die casting motor housing the first thoracic vertebra (T-1).SCANNING THE SPINAL CORDThe spinal cord is a highly sensitive nerve thread. Most of the gray materials are dendrites and cell bodies. The spinal cord along with the brain constitutes vital parts of the central nervous system (CNS). It passes via the vertebral backbone at the central portion of bodys dorsal side.