<P> Grey matter contains most of the brain's neuronal cell bodies . The grey matter includes regions of the brain involved in muscle control, and sensory perception such as seeing and hearing, memory, emotions, speech, decision making, and self - control . </P> <P> The grey matter in the spinal cord is split into three grey columns: </P> <Ul> <Li> The anterior grey column contains motor neurons . These synapse with interneurons and the axons of cells that have travelled down the pyramidal tract . These cells are responsible for the movement of muscles . </Li> <Li> The posterior grey column contains the points where sensory neurons synapse . These receive sensory information from the body, including fine touch, proprioception, and vibration . This information is sent from receptors of the skin, bones, and joints through sensory neurons whose cell bodies lie in the dorsal root ganglion . This information is then transmitted in axons up the spinal cord in spinal tracts, including the dorsal column - medial lemniscus tract and the spinothalamic tract . </Li> <Li> The lateral grey column is the third column of the spinal cord . </Li> </Ul> <Li> The anterior grey column contains motor neurons . These synapse with interneurons and the axons of cells that have travelled down the pyramidal tract . These cells are responsible for the movement of muscles . </Li>

What is the grey matter of the brain