SUBSTANTIA MEDULLARIS Meaning and
Definition
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Substantia medullaris is a term used in anatomy and neuroscience to refer to a specific region or structure in the central nervous system (CNS). It specifically refers to the inner, or deepest, part of the medulla oblongata, which is the lowermost segment of the brainstem.
The medulla oblongata is an essential part of the brainstem responsible for relaying nerve signals between the brain and spinal cord, and regulating vital functions such as breathing, heartbeat, and blood pressure. Within the medulla oblongata, the substantia medullaris is located centrally, near the midline of the brainstem.
The substantia medullaris contains various important structures, including the hypoglossal nucleus, which controls the movements of the tongue, the vestibular nuclei involved in maintaining balance and coordinating eye movements, and the dorsal motor nucleus of the vagus nerve, which regulates numerous autonomic functions.
This region also contains white matter tracts that connect different parts of the brain, allowing for communication and integration of information between different areas. These tracts include the medial lemniscus, which transmits sensory information related to touch, vibration, and conscious proprioception.
Overall, the substantia medullaris plays a crucial role in several vital functions and serves as a relay station and an integration center for both sensory and motor information within the brainstem.
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Medullary substance; the notes the following: s. m. glanduloe suprarenalis, suprarenal gland, s. m. lymphoglanduloe, lymph node, s. m. renis, kidney, s. m. osssium, bone-marrow, medulla ossium.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for SUBSTANTIA MEDULLARIS
- substauntiamedullaris
- s ubstantia medullaris
- su bstantia medullaris
- sub stantia medullaris
- subs tantia medullaris
- subst antia medullaris
- substa ntia medullaris
- substan tia medullaris
- substant ia medullaris
- substanti a medullaris
- substantia m edullaris
- substantia me dullaris
- substantia med ullaris
- substantia medu llaris
- substantia medul laris
- substantia medull aris
- substantia medulla ris
- substantia medullar is
- substantia medullari s
Etymology of SUBSTANTIA MEDULLARIS
The word substantia medullaris is of Latin origin. It can be broken down as follows:
Substantia comes from the Latin word substantia meaning substance or essence.
Medullaris is the Latin genitive form of medulla which means marrow or pith. In anatomy, it refers to the innermost part of an organ or structure.
Thus, substantia medullaris can be roughly translated as medullary substance or the substance of the medulla.
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