Evaluation of reflex changes. 1  Muscle: Stretch reflexes are depressed in parallel to loss of strength. 2  Neuromuscular junction: Stretch reflexes are depressed in parallel to loss of strength. 3  Peripheral Nerve: Stretch reflexes are depressed, usually out of proportion to weakness (which may be minimal).
Spinal cord: The major column of nerve tissue that is connected to the brain and lies within the vertebral canal and from which the spinal nerves emerge. Thirty-one pairs of spinal nerves originate in the spinal cord: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal. The spinal cord and the brain constitute the central nervous system. The spinal cord consists of nerve fibers that transmit impulses to and from the brain. Like the brain, the spinal cord is covered by three connective-tissue envelopes called the meninges.
What is spinal cancer? Primary spinal cancer develops from cells within the spinal cord or from its surrounding structures (the bones, tissues, fluid or nerves of the spine).Part of the central nervous system (CNS), the spinal cord is a column of nerve tissue which extends from the base of the brain down the back.It is surrounded by three protective membranes and is enclosed within the vertebrae. The spinal cord carries important messages between the brain and the rest of the body.ancer can begin in the CNS or, more commonly, it can spread there. Primary spinal cord or column tumors are tumors that form from cells within the spinal cord itself or from its surrounding structures.