Latest - - (Latest - 1. What is the NIH Stroke Scale? Ans...

NIH Stroke Scale and Visual System Week 8

(Latest -

• What is the NIH Stroke Scale?

Answer: Evaluates the effects of an acute cerebral infarction on the levels of

consciousness, language, neglect, visual-field loss, extraocular movement, motor strength, ataxia, dysarthria, and sensory loss

The lower the score, the less impaired the patient: 0=normal Takes 10-15 minutes to administer

• What was the stroke scale originally used for?

Answer: Originally developed as a research tool to evaluate initial neurological stroke symptoms for clinical trials - still widely used in stroke research

• Where is it primarily used?

Answer: Used primarily in the acute care setting to:

• Evaluate the severity of stroke symptoms
• Determine treatment options
• Predict outcomes

• What does the stroke scale measure?

Answer:

1a. Level of Consciousness (0-3) 1b. LOC Questions (0-2) 1c. LOC Commands (0-2)

• Best Gaze (0-2)
• Visual (0-3)
• Facial Palsy (0-3)
• Motor Arm (0-4 or UN for each arm
• Motor Leg (0-4 or UN for each leg)
• Limb Ataxia (0-2 or UN for each limb) 1 / 2

• Sensory (0-2)
• Best Language (0-3)
• Dysarthria (0-3 or UN)
• Extinction and Inattention (0-2)

• No stroke symptoms

Answer: 0

• Minor Stroke

Answer: 1-4

• Moderate Stroke

Answer: 5-15

• Moderate-Severe Stroke

Answer: 16-20

• Severe Stroke

Answer: 21-42

• Four phases of visual perception

Answer:

• Refraction of light rays by lens & cornea

• Conversion of light electromagnetic energy by retinal photoreceptor cells

• Transmission of impulses from retinal photoreceptors to visual cortex

• Perception of images in the visual cortex

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