What is a neurologic lesion?
Brain lesions are a type of damage to any part of brain. Lesions can be due to disease, trauma or a birth defect. Sometimes lesions appear in a specific area of the brain. At other times, the lesions are present in a large part of the brain tissue. At first, brain lesions may not produce any symptoms.
How do you find brain lesions?
A brain lesion is an abnormality seen on a brain-imaging test, such as magnetic resonance imaging (MRI) or computerized tomography (CT). On CT or MRI scans, brain lesions appear as dark or light spots that don’t look like normal brain tissue.
What are some neurological questions?
Here, neurologists choose five questions they think patients should ask to get the best possible care.
- Should I Get a Second Opinion?
- Should I Start Making Plans to Change My Home or Job?
- How Will This Test Impact My Care?
- What Side Effects Can Occur With This New Medication?
What is included in a neurological assessment?
A thorough neurologic assessment will include assessing mental status, cranial nerves, motor and sensory function, pupillary response, reflexes, the cerebellum, and vital signs. However, unless you work in a neuro unit, you won’t typically need to perform a sensory and cerebellar assessment.
What are localising signs?
Neurological signs have been described as “false localising” if they reflect dysfunction distant or remote from the expected anatomical locus of pathology, hence challenging the traditional clinicoanatomical correlation paradigm on which neurological examination is based.
What causes lesions in the frontal lobe?
The cause of frontal lobe disorders includes an array of diseases ranging from closed head trauma (that may cause orbitofrontal cortex damage) to cerebrovascular disease, tumors compressing the frontal lobe, and neurodegenerative disease.
Which is the correct response to a fastigial nucleus lesion?
There is only one correct response. cells receive input from the fastigial nucleus lesion results in a dilated pupil in the left eye lesion results in loss of pain and temperature from the right side of the face lesion results in a left nystagmus lesion results in loss of consensual gag reflex upon stimulation of the right side of the pharynx
Where are burst neurons located in the brain?
The burst neurons responsible for vertical saccades are located in the paramedian rostral interstitial nucleus of the MLF (riMLF). 28. What serves as the neural integrator for vertical gaze and torsion? The interstitial nucleus of Cajal (INC) serves as the neural integrator for vertical gaze and torsion.
Can a person with severe optic neuropathies see light?
Yes. Because the afferent pathways serving the light reflex and the near reflex are anatomically distinct, patients with severe optic neuropathies will still have intact, brisk pupillary responses to near stimuli, while their pupils will not, or will only poorly, react to light’ 5.
Where does the postganglionic parasympathetic fiber innervate the pupil?
The postganglionic parasympathetic fibers innervate the ciliary muscle (for lens accommodation) and the pupillary sphincter muscle (for pupil constriction) in a proportion of 30:1. (This is important to understand the pathophysiology of the tonic [Adie] pupil.)