What is a brainstem lesion?

What is a brainstem lesion?

Brainstem cavernous angiomas are lesions that can be found in the pons, medulla, or midbrain regions. The brainstem is referred to as an ‘eloquent’ region of the brain because so many important functions are controlled by the nerves in this area.

What causes brainstem lesion?

Causes of brainstem white matter lesions: Small strokes: Brainstem strokes are attributed to “small vessel disease”. These are generally attributed to hypertension or hyperlipidemia. MS and related conditions: Demyelinating disorders such as multiple sclerosis can cause BWM.

Which part of the brainstem contains the nuclei for CN VIII?

Cranial nerve VIII is purely a sensory nerve and both of its portions course together until they reach their nuclei within the brainstem. The vestibular portion of the nerve provides input to the vestibular nuclei located along the lateral portion of the fourth ventricle in the inferior pons.

Where in the brainstem can a lesion produce coma?

Our findings suggest that lesions confined to the upper pons can cause coma in humans even in the absence of damage to the midbrain. The findings also point to the brainstem nuclei whose lesions are likely to be associated with loss of consciousness and fatal hyperthermia in humans.

Are lesions cancerous?

Lesions can be categorized according to whether or not they are caused by cancer. A benign lesion is non-cancerous whereas a malignant lesion is cancerous. For example, a biopsy of a skin lesion may prove it to be benign or malignant, or evolving into a malignant lesion (called a premalignant lesion).

Can lesions on the brain heal?

The prognosis for surviving and recovering from a brain lesion depends upon the cause. In general, many brain lesions have only a fair to poor prognosis because damage and destruction of brain tissue is frequently permanent. However, some people can reduce their symptoms with rehabilitation training and medication.

What shape does the brain stem most likely have?

tube-shaped
Anatomy. The brain stem is a tube-shaped mass of nervous tissue a little over 3 inches (8 cm) long. It is located at the base of the brain, superior to the spinal cord and inferior to the cerebrum.

What is the other name of brainstem?

medulla oblongata. !!!!!

Why is it called a vegetative state?

The name vegetative state was chosen to refer to the preserved vegetative nervous functioning, meaning these patients have (variably) preserved sleep-wake cycles, respiration, digestion or thermoregulation.

Do pupils react in coma?

All cranial nerve or brain stem reflexes must be absent without any spontaneous respirations. The pupils do not react to light and the corneal, oculocephalic (doll’s eyes), oculovestibular (cold caloric) and gag reflexes are absent.