{"uid":"cap_2sxnC0ovjm0M85x1ERgtg","slug":"magent-mnihss-calculator-meyer-lyden-2001-6670e1d3","name":"magent mNIHSS Calculator (Meyer/Lyden 2001)","description":"Meyer/Lyden 2001 modified NIH Stroke Scale (mNIHSS): eleven caller-assigned NINDS-style integers. Drops LOC, facial palsy, limb ataxia, and dysarthria; collapses sensory to 0 = normal or 1 = abnormal; keeps left/right motor arm and leg (each 0-4). Sum 0-31. magent does not examine the patient. No total-score severity bands in Meyer 2001; later website cutoffs are not applied. Not Brott 1989 NIHSS, not a tPA order, not a diagnosis, and not a medical device.","url":"https://api.magentlab.com/api/calc/mnihss","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"queryParams":{"type":"object","required":["loc_questions","loc_commands","best_gaze","best_visual","left_arm","right_arm","left_leg","right_leg","sensory","best_language","neglect"],"properties":{"neglect":{"enum":[0,1,2],"type":"integer","description":"Caller-assigned Meyer 2001 neglect (integer 0-2): 0 no neglect, 1 partial neglect, 2 complete neglect. magent does not examine the patient."},"sensory":{"enum":[0,1],"type":"integer","description":"Caller-assigned Meyer 2001 sensory (integer 0-1): 0 normal, 1 abnormal. Collapsed from NIHSS 0-2; 2 is invalid. magent does not examine the patient."},"left_arm":{"enum":[0,1,2,3,4],"type":"integer","description":"Caller-assigned Meyer 2001 left arm motor, NINDS style (integer 0-4): 0 no drift, 1 drift, 2 some effort against gravity, 3 no effort against gravity, 4 no movement. Not Brott weaker-limb. magent does not examine the patient."},"left_leg":{"enum":[0,1,2,3,4],"type":"integer","description":"Caller-assigned Meyer 2001 left leg motor, NINDS style (integer 0-4): 0 no drift, 1 drift, 2 some effort against gravity, 3 no effort against gravity, 4 no movement. Not Brott weaker-limb. magent does not examine the patient."},"best_gaze":{"enum":[0,1,2],"type":"integer","description":"Caller-assigned Meyer 2001 best gaze (integer 0-2): 0 normal, 1 partial gaze palsy, 2 forced deviation. magent does not examine the patient."},"right_arm":{"enum":[0,1,2,3,4],"type":"integer","description":"Caller-assigned Meyer 2001 right arm motor, NINDS style (integer 0-4): 0 no drift, 1 drift, 2 some effort against gravity, 3 no effort against gravity, 4 no movement. Not Brott weaker-limb. magent does not examine the patient."},"right_leg":{"enum":[0,1,2,3,4],"type":"integer","description":"Caller-assigned Meyer 2001 right leg motor, NINDS style (integer 0-4): 0 no drift, 1 drift, 2 some effort against gravity, 3 no effort against gravity, 4 no movement. Not Brott weaker-limb. magent does not examine the patient."},"best_visual":{"enum":[0,1,2,3],"type":"integer","description":"Caller-assigned Meyer 2001 best visual (integer 0-3): 0 no visual loss, 1 partial hemianopia, 2 complete hemianopia, 3 bilateral hemianopia. magent does not examine the patient."},"loc_commands":{"enum":[0,1,2],"type":"integer","description":"Caller-assigned Meyer 2001 LOC commands (integer 0-2): 0 obeys both correctly, 1 obeys one correctly, 2 incorrect. magent does not examine the patient."},"best_language":{"enum":[0,1,2,3],"type":"integer","description":"Caller-assigned Meyer 2001 best language (integer 0-3): 0 no aphasia, 1 mild to moderate, 2 severe aphasia, 3 mute. magent does not examine the patient."},"loc_questions":{"enum":[0,1,2],"type":"integer","description":"Caller-assigned Meyer 2001 LOC questions (integer 0-2): 0 answers both correctly, 1 answers one correctly, 2 incorrect. magent does not examine the patient."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_jZDAonM_MtAjgTECT874J","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the modified NIH Stroke Scale (mNIHSS) total score (0–31) from eleven caller-assigned neurological subscores per the Meyer/Lyden 2001 protocol","exampleAgentPrompt":"Calculate the mNIHSS (Meyer/Lyden 2001) for a patient with LOC questions 1, LOC commands 1, best gaze 0, best visual 1, left arm 2, right arm 0, left leg 2, right leg 0, sensory 1, best language 1, and neglect 1 — what's the total score?","exampleUseCases":[{"title":"Post-stroke severity documentation","prompt":"I need the mNIHSS total for a stroke patient: LOC questions 0, LOC commands 1, best gaze 1, best visual 0, left arm 3, right arm 0, left leg 3, right leg 0, sensory 1, best language 2, neglect 1 — calculate the Meyer 2001 score for me."},{"title":"Research data entry validation","prompt":"For my stroke registry dataset, compute the modified NIH stroke scale (mNIHSS) using these subscores: loc_questions 2, loc_commands 2, best_gaze 2, best_visual 2, left_arm 4, right_arm 0, left_leg 4, right_leg 0, sensory 1, best_language 3, neglect 2. What's the sum?"},{"title":"Telemedicine stroke triage support","prompt":"Based on the neuro exam reported over the phone — LOC questions 0, LOC commands 0, gaze 0, visual 1, left arm 1, right arm 0, left leg 1, right leg 0, sensory 0, language 1, neglect 0 — what does the mNIHSS calculator give as the total?"}],"resultDescription":"Returns the computed mNIHSS total score (integer 0–31) derived from the eleven caller-supplied subscores as defined in the Meyer/Lyden 2001 protocol. The score reflects the arithmetic sum of the individual items; no severity band labels or tPA recommendations are applied.","failureModes":["Missing required query parameter returns an error response","Out-of-range integer for any subscore (e.g. sensory=2) returns validation error","Non-integer value passed for an integer field causes a 400-level error","Network timeout or service unavailability returns a 5xx error"],"whenToPreferThis":"Use this endpoint when you need the specific eleven-item Meyer/Lyden 2001 mNIHSS variant — which drops LOC, facial palsy, limb ataxia, and dysarthria from the full NIHSS and collapses sensory to binary — rather than the full Brott 1989 NIHSS. Prefer this for research or documentation contexts explicitly calling for the mNIHSS formulation with separate left and right motor arm and leg scores (not the weaker-limb-only Brott approach).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:58:59.718Z","isFirstParty":false}