The term "nucleus dorsalis" refers to a group of neurons located in the dorsal part of the spinal cord. The pronunciation of this word is [ˈnuːkliəs dɔːrˈsælɪs], where the stress falls on the second syllable of "nucleus" and the second syllable of "dorsalis". The "c" in "nucleus" is pronounced as "k" and the "u" is pronounced as "yu". "Dorsalis" is pronounced with a long "o" sound and the "s" at the end is pronounced as a "z" sound. Overall, proper spelling and pronunciation is crucial for clear communication in the realm of medical sciences.
The term "nucleus dorsalis" refers to a specific anatomical structure located within the central nervous system, particularly in the dorsal column of the spinal cord. Also known as the Clarke's nucleus or the posterior thoracic nucleus, it is a collection of neurons situated in the intermediary zone of the spinal cord gray matter.
The nucleus dorsalis is specifically found in the posterior thoracic region, spanning from the level of the eighth cervical vertebra (C8) to approximately the second lumbar vertebra (L2) in humans. It is bilaterally present, meaning it exists on both sides of the spinal cord.
Functionally, the nucleus dorsalis is primarily involved in the regulation of proprioception, which refers to the awareness of body position and movement. It receives sensory information from muscle spindles (sensory receptors located within muscles) and transmits this information to the cerebellum via the spinocerebellar tracts. By doing so, it contributes to the coordination and control of voluntary movements.
The nucleus dorsalis is crucial in maintaining posture and coordinating precise movements. Damage or dysfunction of this structure can result in sensory deficits, such as impaired proprioception, leading to problems with gait, muscle coordination, and overall movement control. Understanding the functions and characteristics of the nucleus dorsalis contributes to our knowledge of the intricate workings of the central nervous system and its role in motor control.
Dorsal nucleus, Clarke's column, posterior vesicular column; a group of column cells, extending longitudinally from the 7th or 8th cervical nerve to the level of the 2d lumbar nerve, in the cervix of the posterior gray column or horn of the spinal cord.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "nucleus dorsalis" is of Latin origin.
The term "nucleus" in Latin means "core" or "kernel", denoting a central or essential part. It is derived from the Latin verb "nucere" which means "to be central".
The word "dorsalis" comes from the Latin word "dorsum", meaning "back". It refers to the posterior side of the body or an anatomical structure related to the back.
Therefore, "nucleus dorsalis" can be translated as the "dorsal nucleus" or the "nucleus in the back". It usually refers to specific anatomical nuclei located in the posterior (dorsal) region of certain regions of the central nervous system, particularly in the spinal cord and brainstem.