brain-stem
Học thuậtThân thiện
Definition
Noun: - The part of the brain continuous with the spinal cord: The brain-stem is the lower, stalk-like portion of the brain that connects the cerebrum and cerebellum to the spinal cord. It is responsible for many fundamental life functions.
Usage
The term "brain-stem" is used in medical, biological, and anatomical contexts to refer to this specific, critical region of the brain. It is typically used as a singular noun.
Examples
- The brain-stem controls essential automatic functions like breathing and heart rate.
- Damage to the brain-stem can have severe consequences.
- The surgeon carefully avoided the brain-stem during the procedure.
Advanced Usage
- Brain-stem death: A clinical and legal definition of death based on the irreversible loss of all brain-stem functions.
- After the accident, the patient was declared dead based on tests confirming brain-stem death.
Variants and Related Words
- Brainstem (noun): An alternative, often preferred, spelling written as a single word without a hyphen.
- Brain stem (noun): Another common variant written as two separate words.
- Hindbrain (noun): A related but not perfectly synonymous term; the hindbrain includes the brain-stem's medulla and pons along with the cerebellum.
Synonyms
- Brainstem (n): The most direct synonym, simply a different orthographic form.
- Truncus encephali (n): The Latin anatomical term.
Related Phrases
- Brain-stem reflex: An automatic response mediated by the brain-stem, such as the gag reflex or pupillary light reflex.
- The doctor checked the patient's brain-stem reflexes.
- Brain-stem auditory evoked response (BAER): A test that measures the brain wave activity generated in response to sounds, used to assess brain-stem function.
- The BAER test showed normal brain-stem function.
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