The brain stem connects the brain with the spinal cord. It controls hunger and thirst and some of the most basic body functions, such as body temperature, blood pressure, and breathing. The brain is protected by the bones of the skull and by a covering of three thin membranes called meninges.
Which structure is closest to where the spinal cord begins?
The spinal cord begins at the bottom of the brain stem (at the area called the medulla oblongata) and ends in the lower back, as it tapers to form a cone called the conus medullaris.
What structure in the brain becomes the spinal cord?
Medulla oblongata, also called medulla, the lowest part of the brain and the lowest portion of the brainstem. The medulla oblongata is connected by the pons to the midbrain and is continuous posteriorly with the spinal cord, with which it merges at the opening (foramen magnum) at the base of the skull.
What is GREY matter in spinal cord?
Grey matter refers to unmyelinated neurons and other cells of the central nervous system. It is present in the brain, brainstem and cerebellum, and present throughout the spinal cord. … The grey matter in the spinal cord consists of interneurons, as well as the cell bodies of projection neurons.
What part of your spine controls your legs?
The nerves of the cervical spine go to the upper chest and arms. The nerves in your thoracic spine go to your chest and abdomen. The nerves of the lumbar spine then reach to your legs, bowel, and bladder. These nerves coordinate and control all the body’s organs and parts, and let you control your muscles.
What happens if you have too much grey matter?
The outside of the spinal cord is composed of large white matter tracts. Transecting or compressing these tracts can lead to paralysis because information from the brain’s motor cortex (grey matter) can no longer reach the spinal cord and muscles.
Is the spinal cord white or grey matter?
The grey matter also extends from the brain into the spinal cord. The grey matter creates a hornlike structure throughout the inside of the spinal cord while the white matter makes up the surrounding sections of the spinal cord. The grey matter does extend to the spinal cord to make signaling more effective.
What is gray matter how is it affected by schizophrenia?
Meta-analytical reviews have consistently shown that schizophrenia is associated with a reduction in gray matter volume, indicating the anterior cingulate, thalamus, frontal lobe, hippocampal–amygdala region,12 superior temporal gyrus (STG) and left medial temporal lobe gray matter as key regions of structural deficits …
What vertebrae controls bowels?
The lowest part of the spinal cord is the sacral spinal cord. Bladder function, bladder and bowel external sphincters, sexual functions (including erections and ejaculation in men and responsiveness in women), and some leg muscles are the domain of the sacral spinal cord.