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A concussion, also known as a mild traumatic brain injury (mTBI), is a head injury that temporarily affects brain functioning. [9] Symptoms may include loss of consciousness; memory loss; headaches; difficulty with thinking, concentration, or balance; nausea; blurred vision; dizziness; sleep disturbances, and mood changes. [1]
The Neurological Pupil index, or NPi, is an algorithm developed by NeurOptics, Inc., that removes subjectivity from the pupillary evaluation. A patient's pupil measurement (including variables such as size, latency, constriction velocity, dilation velocity, etc.) is obtained using a pupillometer, and the measurement is compared against a normative model of pupil reaction to light and ...
Diagnosis is suspected based on lesion circumstances and clinical evidence, most prominently a neurological examination, for example checking whether the pupils constrict normally in response to light and assigning a Glasgow Coma Score. [23] Neuroimaging helps in determining the diagnosis and prognosis and in deciding what treatments to give. [76]
Concussion signs and symptoms can also look like age-related issues. If you don’t get checked out, a doctor may not be able to pinpoint the real reason you’re having cognitive difficulties ...
Dilation and constriction of the pupil. Pupillary response is a physiological response that varies the size of the pupil, via the optic and oculomotor cranial nerve.. A constriction response (), [1] is the narrowing of the pupil, which may be caused by scleral buckles or drugs such as opiates/opioids or anti-hypertension medications.
The pupil size is measured, its shape and any asymmetry is tested. A commonly used abbreviation to describe normal pupils is PERRLA (pupils equal, round and reactive to light and accommodation). Pupillary light reflex is tested by having the patient stare into the distance as the examiner shines the penlight obliquely into each pupil. Pupillary ...
For more than 100 years, clinicians have evaluated the pupils of patients with suspected or known brain injury or impaired consciousness to monitor neurological status and trends, checking for pupil size and reactivity to light. [3] In fact, before the advent of electricity, doctors checked a patient’s reaction to light using a candle.
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