The Adult Spinal Column

Abstract - In vivo and in vitro studies it is difficult to understand the relationship between discrete repetitive elevation of disc tissue and degradation during several years of exposure. The purpose of this study was to develop an asymmetric Porovisco elastic finite element model of the lumbar motion segment reflecting the biological properties and behavior of the intervertebral disc in vivo. Finite element prediction was compared with in vivo measurements published by Tyrrell et al. (1985) Overall bit size rate of change for both loading scenarios, short term creep loading and restoration recovery, and short term cyclic loading with static recovery.

Spinal cord - a collection of neurons and supporting tissues extending from the bottom to the center of the brain and protected by bone pillars (spine). Peripheral nervous system (PNS) - includes all parts of the brain and spinal cord outside the nervous system; sensory nerves and motor nerves. Biofeedback - A way to learn to control bodily functions, including those considered generally involuntary by feedback and signal changes from signals involved in monitoring functions. Sympathetic nervous system - mobilization of body resources to increase energy output between mood and stress and subdivision of autonomic nervous system

In the central nervous system, the brain and spinal cord are two main parts. The brain and spinal cord are protected with bones. The skull surrounds the brain, and the vertebrae of the spine surround the spinal cord. The brain and spinal cord are also covered and protected by three strong membranes called membranes. Cerebrospinal fluid can buffer the brain and spine. The brain has four ventricles filled with body fluids, and the central tube is filled with thorns. The brain has three main parts, cerebellum, brain, medulla. The thalamus, hypothalamus, and bridge are also included. The thalamus is the relay center between the brain and the spine (also in the perception of pain). The hypothalamus controls body temperature, blood pressure, sleep and mood (it is also involved and controls the endocrine system). Pons is a relay system connecting backbone and main parts. The brain is the biggest part of the brain