brainstem
Definition
- Noun:
- The part of the brain continuous with the spinal cord: The brainstem is the central trunk of the brain, connecting the spinal cord to the higher brain regions like the cerebrum and cerebellum. It is responsible for many automatic functions essential for life.
Usage
- The brainstem is a critical structure for basic physiological functions.
- It is often discussed in the contexts of neurology, anatomy, and medicine.
- When used, it typically refers to the entire structure comprising specific components.
Examples
- Noun:
- Damage to the brainstem can affect vital functions like breathing and heart rate.
- The brainstem consists of the medulla oblongata, the pons, and the midbrain.
- Signals from the body pass through the brainstem on their way to the brain.
Advanced Usage
- "Brainstem death": A clinical and legal definition of death based on the irreversible cessation of all brainstem functions.
- After the accident, the patient was declared dead based on brainstem death criteria.
- "Brainstem auditory evoked response (BAER)": A test that measures the brain's response to sounds, used to assess hearing and brainstem function.
- The audiologist ordered a BAER test to evaluate the infant's hearing pathway.
Variants and Related Words
- Brain stem: An alternative, less common spelling for .
- Hindbrain: A broader term that includes the brainstem (specifically the medulla and pons) and the cerebellum.
- Brainstem nuclei: Specific clusters of neurons (nerve cells) within the brainstem that control various functions.
Synonyms
- Brain stem (n): The alternative spelling.
- Nervous system structure (n): A very general term; is a specific instance.
Related Phrases
- Brainstem function: Refers to the activities controlled by the brainstem.
- The doctor assessed the patient's brainstem function.
- Brainstem lesion: Refers to damage or an abnormality in the brainstem.
- The MRI showed a small brainstem lesion.
Notes on Meaning
The term brainstem refers specifically to the anatomical structure. It does not have idiomatic meanings. Its primary use is in scientific, medical, and academic contexts to describe this crucial part of the central nervous system.
Noun
-
the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamus
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