Neuromere is a term used in neurobiology and anatomy to refer to a segment of the embryonic neural tube that differentiates into distinct regions of the adult nervous system. Its phonetic transcription is ˈnʊəroʊmɪər or NOOR-o-myoor. The word combines the root "neuro" meaning nerve and "mere" meaning part, segment or unit. Therefore, neuromere implies a fundamental structural unit of the nervous system. Proper spelling and pronunciation of this term is important for clear communication in neurobiological research and academic discussions.
A neuromere refers to a segmental unit or repeating structure found in the developing central nervous system (CNS) of vertebrates, particularly in the early stages of embryonic development. It is a basic building block that contributes to the overall structure and functional organization of the nervous system.
Each neuromere consists of a group of cells that share similar origins and characteristics, forming a distinct segment within the CNS. These segments are arranged in a linear sequence along the longitudinal axis of the developing embryo, giving rise to different regions of the nervous system.
Neuromeres are critical for the proper development and differentiation of neural tissues, as they provide a framework for the arrangement and specialization of various neuroanatomical structures. They serve as a blueprint from which the brain and spinal cord form, undergoing further differentiation and arrangement into specific regions and structures, including the forebrain, midbrain, hindbrain, and spinal cord.
The concept of neuromeres is essential in understanding the regionalization and patterning of the nervous system in vertebrates. It helps in explaining the evolutionary and comparative anatomy of the CNS by highlighting the core segments that persist across diverse species. Moreover, abnormalities or disruptions in neuromeric organization can lead to developmental defects or neurological disorders.
One of the dilatations formed at the anterior extremity of the neural groove in the embryo; as the groove becomes converted into the neural tube, the neuromeres resolve themselves into the three primary cerebral vesicles.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "neuromere" is derived from two roots: "neuro" and "mere".
- "Neuro" comes from the Greek word "neuron" meaning "nerve". It is commonly used to refer to nerves or the nervous system.
- "Mere" is derived from the Latin word "merus" meaning "pure" or "unadulterated".
Therefore, "neuromere" combines these two roots to describe a pure or unadulterated unit or segment of the nervous system. It is often used in biology to refer to the repeated segments or units that make up the nervous system, especially in the development of the embryonic vertebrate brain and spinal cord.