Central Nervous system (CNS) history taking for medical students

Stethogram
Central nervous system history taking for medical students
Identification Data
• Name: 
• Age/Sex:
• Address:
• Educational status:
• Occupation:
• Marital status: 
• Place of consultation: OPD / Emergency / Ward
• Date of admission:
• Informant:
- Name: _______
- Reliability of history: Reliable / Unreliable



Chief Complaints
• Chief complaints in chronological order with duration.

History of Presenting Illness (HOPI)

Headache
• Present / Absent
• Duration: ______________________________
• Onset: Sudden / Gradual
• Course: Progressive / Non-progressive
• Site: Frontal/ Temporal/ Occipital/ Parietal/ Holocranial/ Retro-orbital/ Other:____
• Character: Throbbing/ Dull aching/ Bursting/ Stabbing/ Band-like/ Other:___
• Severity: _____/10
• Aggravating Factors: Coughing/ Sneezing/ Bending forward/ Bright light/ Loud sounds/ Exertion/ Stress
• Relieving Factors: Rest/ Sleep/ Analgesics/ Vomiting
• Associated Symptoms: Nausea/ Vomiting/ Photophobia/ Phonophobia/ Fever/ Visual disturbances/ Seizures/ Altered consciousness



Loss of Consciousness (LOC)
• Present / Absent
• Duration since: 
• Onset: Sudden / Gradual
• Number of episodes: 
• Duration of each episode: 
• Nature: Complete/ Partial
• Recovery: Spontaneous/ Required intervention

Associated Features
• Tongue bite
• Urinary incontinence
• Abnormal limb movements
• Postictal confusion
• Palpitations
• Chest pain
• Trauma



Seizures
• Present / Absent
• Duration since :
• Type: Generalized/ Focal
• Character: Tonic-clonic/ Absence/ Myoclonic/ Other: _____
• Duration of episodes:
• Frequency of attacks: 
• Aura: Visual/ Auditory/ Olfactory/ Sensory
• Tongue bite
• Urinary incontinence
• Frothing from mouth
• Post-ictal confusion
• Previous episodes
• Compliance with antiepileptic drugs



Weakness of Limbs
• Present / Absent
• Duration: ______________________________
• Distribution: Right upper limb/ Left upper limb/ Right lower limb/ Left lower limb/ Both upper limbs/ Both lower limbs/ All four limbs
• Onset: Sudden/ Gradual
• Course: Progressive(Ascending/descending)/ Non-progressive
• Pattern: Proximal/ Distal 
• Associated Features
- Difficulty walking
- Difficulty climbing stairs
- Difficulty combing hair
- Difficulty holding objects
- Facial deviation
- Speech difficulty
- Sensory symptoms



Sensory Symptoms
• Present / Absent
• Nature: Numbness/ Tingling/ Burning sensation/ Pins-and-needles sensation/ Loss of sensation
• Distribution: One limb/ One side of body/ Glove-and-stocking distribution/ Dermatomal distribution



Speech Disturbance
• Present / Absent
• Slurring of speech
• Inability to speak
• Difficulty understanding speech
• Difficulty naming objects



Cranial Nerve Symptoms
• Facial deviation
• Double vision (Diplopia)
• Blurring of vision
• Loss of vision
• Hearing loss
• Difficulty swallowing
• Nasal regurgitation
• Hoarseness of voice
• Facial numbness
• Loss of smell
• Loss of taste



Gait and Balance
• Difficulty walking: Present / Absent
• Imbalance while walking: Present / Absent
• Frequent falls: Present / Absent
• Swaying while walking: Present / Absent
• Inability to stand: Present / Absent

History of
• Tremors
• Stiffness
• Slowing of movements
• Involuntary movements



Memory and Higher Mental Functions
• Forgetfulness
• Personality changes
• Altered behaviour
• Confusion
• Hallucinations
• Poor concentration
• Impaired judgment



Visual Symptoms
• Blurring of vision
• Double vision
• Transient vision loss
• Visual field defects
• Photophobia



Bladder and Bowel Involvement
• Urinary retention
• Urinary incontinence
• Constipation
• Fecal incontinence
• Erectile dysfunction



Constitutional Symptoms
• Fever
• Weight loss
• Anorexia
• Fatigue
• Night sweats
• Altered sensorium



History Suggestive of Stroke
• Sudden onset weakness
• Facial deviation
• Slurred speech
• Difficulty swallowing
• Sudden vision loss
• Altered consciousness
• Hypertension
• Diabetes mellitus
• Atrial fibrillation
• Previous stroke/TIA



History Suggestive of Epilepsy
• Recurrent seizures
• Aura
• Tongue bite
• Urinary incontinence
• Postictal confusion
• Family history of epilepsy
• Drug compliance



History Suggestive of Parkinson Disease
• Resting tremor
• Bradykinesia
• Rigidity
• Shuffling gait
• Mask-like facies
• Postural instability



History Suggestive of Meningitis
• Fever
• Severe headache
• Neck stiffness
• Vomiting
• Photophobia
• Altered consciousness
• Seizures



History Suggestive of Raised Intracranial Pressure
• Early morning headache
• Projectile vomiting
• Blurring of vision
• Diplopia
• Altered sensorium
• Seizures



Past History

Previous history of:
• Stroke/TIA
• Epilepsy
• Hypertension
• Diabetes mellitus
• Tuberculosis
• Meningitis
• Head injury
• Brain tumor
• Migraine
• Parkinson disease
• Multiple sclerosis
• Other neurological illness: 



Previous Interventions/Hospitalizations
• Previous hospital admissions
• ICU admission
• Neurosurgery
• Blood transfusion
• Rehabilitation therapy



Drug History

History of use of:
• Antiepileptic drugs
• Antiplatelets
• Anticoagulants
• Antihypertensives
• Steroids
• Anti-Parkinsonian medications
• Other medications: ______________

• Drug allergy: Present / Absent



Treatment History

Previous investigations:
• CT Brain
• MRI Brain
• EEG
• Lumbar puncture
• Nerve conduction study (NCS)
• Electromyography (EMG)
• Carotid Doppler
• Other investigations: ______________

Previous treatment:
• Thrombolysis
• Thrombectomy
• Neurosurgery
• Rehabilitation therapy
• Other treatment: ______________



Personal History
• Appetite: Normal / Reduced
• Diet: Vegetarian / Mixed
• Sleep: Adequate / Disturbed
• Bowel habits: Normal / Abnormal
• Bladder habits: Normal / Abnormal



Addiction History
• Smoking: Present / Absent
• Alcohol intake: Present / Absent
• Tobacco chewing: Present / Absent
• Substance abuse: Present / Absent

Details (Smoking: Pack year/Smoking index, Alcohol details, etc)

Family History
History / No history of:
• Stroke
• Epilepsy
• Migraine
• Parkinson disease
• Dementia
• Neuromuscular disorders
• Hereditary neurological diseases

• Pedigree suggestive of inherited neurological disorder: Yes / No

Once history taking is complete, proceed to the CNS Examination to assess neurological findings.
🧠 Central Nervous System (CNS) History Summary
Full Template

Mr./Mrs. ______, a __-year-old Male/Female, resident of ______, education status ______, working as a ______, presented to OPD/Emergency with complaints of __________ for the past _____ days/months/years.

Headache

The patient was apparently asymptomatic until _____ ago when he/she developed headache, which was sudden/gradual in onset and progressive/non-progressive in nature. The headache was localized to the frontal, temporal, occipital, parietal, holocranial, or retro-orbital region and was throbbing, dull aching, bursting, stabbing, or band-like in character. Severity was ___/10.

The headache was aggravated by coughing, sneezing, bending forward, bright light, loud sounds, exertion, or stress and relieved by rest, sleep, analgesics, or vomiting. It was associated with nausea, vomiting, photophobia, phonophobia, fever, visual disturbances, seizures, or altered consciousness.

🔴 Abnormal Clues – Headache
  • Sudden "thunderclap" headache → Subarachnoid hemorrhage
  • Early morning headache with vomiting → Raised intracranial pressure (ICP)
  • Throbbing unilateral headache with photophobia → Migraine
  • Band-like headache → Tension headache
  • Headache with fever and neck stiffness → Meningitis

Loss of Consciousness (LOC)

The patient experienced/did not experience loss of consciousness since _____ days / ___ days ago. If present, it was sudden/gradual in onset, lasting _____ minutes, complete/partial, with spontaneous recovery or requiring intervention. Associated features included tongue bite, urinary incontinence, abnormal limb movements, postictal confusion, palpitations, chest pain, or trauma.

🔴 Abnormal Clues – Loss of Consciousness
  • Transient LOC with rapid recovery → Syncope
  • LOC with tongue bite and postictal confusion → Generalized seizure
  • Progressive drowsiness → Raised ICP, encephalopathy

Seizures

The patient developed/did not develop seizures since _____. Episodes were generalized/focal, tonic-clonic/absence/myoclonic, lasting _____ minutes. History/No history of aura (visual, auditory, olfactory, sensory), tongue bite, urinary incontinence, frothing from mouth, and postictal confusion. Frequency of attacks was _____. Compliance with antiepileptic drugs and previous episodes were assessed.

🔴 Abnormal Clues – Seizures
  • Focal seizure progressing to generalized seizure → Structural brain lesion
  • Recurrent generalized seizures → Epilepsy
  • New-onset seizure in elderly → Stroke, brain tumor

Weakness of Limbs

The patient developed weakness of bilateral/unilateral ___ limb since _____. It was sudden/gradual in onset, progressive/non-progressive, involving the right/left upper limb, lower limb, both upper limbs, both lower limbs, or all four limbs. Weakness was proximal/distal, associated with difficulty walking, climbing stairs, combing hair, holding objects, facial deviation, speech difficulty, or sensory symptoms.

🔴 Abnormal Clues – Weakness of Limbs
  • Sudden hemiparesis → Stroke
  • Ascending weakness → Guillain–Barré syndrome
  • Progressive symmetrical proximal weakness → Myopathy
  • Quadriparesis → Cervical cord lesion

Sensory Symptoms

The patient complained/did not complain of numbness, tingling, burning sensation, pins-and-needles sensation, or loss of sensation. Symptoms involved one limb, one side of the body, glove-and-stocking distribution, or dermatomal distribution.

🔴 Abnormal Clues – Sensory Symptoms
  • Glove and stocking sensory loss → Peripheral neuropathy
  • Dermatomal sensory loss → Radiculopathy
  • Hemisensory loss → Stroke

Speech Disturbance

The patient developed/did not develop slurring of speech, inability to speak, difficulty understanding speech, or difficulty naming objects.

🔴 Suggestive Of – Speech Disturbance
  • Stroke
  • Aphasia
  • Dysarthria
  • Space-occupying lesion

Cranial Nerve Symptoms

History/No history of facial deviation, double vision (diplopia), blurring/loss of vision, hearing loss, difficulty swallowing, nasal regurgitation, hoarseness of voice, facial numbness, loss of smell, or loss of taste.

🔴 Abnormal Clues – Cranial Nerve Symptoms
  • Facial deviation with limb weakness → Stroke
  • Diplopia with ptosis → Myasthenia gravis
  • Difficulty swallowing → Bulbar palsy

Gait and Balance

The patient complained/did not complain of difficulty walking, imbalance, frequent falls, swaying while walking, or inability to stand. History of tremors, stiffness, slowing of movements, or involuntary movements was elicited.

🔴 Abnormal Clues – Gait and Balance
  • Shuffling gait → Parkinson disease
  • Ataxic gait → Cerebellar lesion
  • Spastic gait → Upper motor neuron lesion
  • High-stepping gait → Peripheral neuropathy

Memory & Higher Mental Functions

The patient developed/did not develop forgetfulness, personality changes, altered behaviour, confusion, hallucinations, poor concentration, or impaired judgment.

🔴 Suggestive Of – Memory & Higher Mental Functions
  • Dementia
  • Delirium
  • Frontal lobe lesion
  • Encephalopathy

Visual Symptoms

No history/History of blurring of vision, double vision, transient vision loss, visual field defects, and photophobia.

🔴 Abnormal Clues – Visual Symptoms
  • Transient monocular blindness → Transient ischemic attack
  • Bitemporal hemianopia → Pituitary tumor
  • Homonymous hemianopia → Stroke

Bladder & Bowel Involvement

History/No history of urinary retention, urinary incontinence, constipation, fecal incontinence, or erectile dysfunction.

🔴 Suggestive Of – Bladder & Bowel Involvement
  • Spinal cord lesion
  • Cauda equina syndrome
  • Multiple sclerosis

Constitutional Symptoms

Fever, weight loss, anorexia, fatigue, night sweats, and altered sensorium were present/absent.

🔴 Abnormal Clues – Constitutional Symptoms
  • Fever with headache and neck stiffness → Meningitis
  • Weight loss with focal neurological deficit → Brain tumor
  • Altered sensorium with fever → Encephalitis

History Suggestive Of
🔵 History Suggestive of Stroke
  • Sudden onset weakness
  • Facial deviation
  • Slurred speech
  • Difficulty swallowing
  • Sudden vision loss
  • Altered consciousness
  • Hypertension
  • Diabetes
  • Atrial fibrillation
  • Previous stroke/TIA
🔵 History Suggestive of Epilepsy
  • Recurrent seizures
  • Aura
  • Tongue bite
  • Urinary incontinence
  • Postictal confusion
  • Family history
  • Drug compliance
🔵 History Suggestive of Parkinson Disease
  • Resting tremor
  • Bradykinesia
  • Rigidity
  • Shuffling gait
  • Mask-like facies
  • Soft voice
  • Postural instability
🔵 History Suggestive of Meningitis
  • Fever
  • Severe headache
  • Neck stiffness
  • Vomiting
  • Photophobia
  • Altered consciousness
  • Seizures
🔵 History Suggestive of Raised Intracranial Pressure
  • Early morning headache
  • Projectile vomiting
  • Blurring of vision
  • Diplopia
  • Altered sensorium
  • Seizures

Past, Drug, Treatment, Personal & Family History

Past History:No previous history/ history of stroke/TIA, epilepsy, hypertension, diabetes, tuberculosis, meningitis, head injury, brain tumor, migraine, Parkinson disease, or multiple sclerosis. No History of previous hospitalizations, neurosurgery, ICU admission, or blood transfusion.

Drug History:History/ No history of use of antiepileptic drugs, antiplatelets, anticoagulants, antihypertensives, steroids, or anti-Parkinsonian medications. No history of any drug allergy.

Treatment History: Previous CT/MRI brain, EEG, lumbar puncture, nerve conduction study, EMG, carotid Doppler, neurosurgery, thrombolysis, thrombectomy, or rehabilitation.

Personal History:His/her Appetite is normal/reduced. He/She is Vegetarian/Consumes mixed diet. Sleep is adequate/disturbed. History/No history of smoking, alcohol intake, tobacco chewing, or substance abuse.

Family History:No family history of Stroke, epilepsy, migraine, Parkinson disease, dementia, neuromuscular disorders, or hereditary neurological diseases.

✅ One-Line Normal Summary
Normal Presentation

Mr./Ms. ______, a __-year-old individual, presented with mild headache for ___ days without history of seizures, limb weakness, sensory deficits, speech disturbance, altered consciousness, visual symptoms, or significant neurological illness, suggestive of a benign primary headache disorder.

🧠 One-Line Summary – Acute Ischemic Stroke
Abnormal Presentation

Mr./Ms. ______, a __-year-old hypertensive/diabetic individual, presented with sudden onset right/left-sided weakness, facial deviation, slurring of speech, and difficulty walking without preceding trauma, suggestive of an acute cerebrovascular accident (ischemic stroke).

⚡ One-Line Summary – Epilepsy
Abnormal Presentation

Mr./Ms. ______, a __-year-old individual, presented with recurrent generalized tonic-clonic seizures associated with tongue bite, urinary incontinence, and postictal confusion, suggestive of epilepsy.

🦠 One-Line Summary – Acute Meningitis
Abnormal Presentation

Mr./Ms. ______, a __-year-old individual, presented with high-grade fever, severe headache, repeated vomiting, neck stiffness, photophobia, and altered sensorium, suggestive of acute meningitis.

🚨 One-Line Summary – Raised Intracranial Pressure / Brain Tumor
Abnormal Presentation

Mr./Ms. ______, a __-year-old individual, presented with progressively worsening early morning headache, projectile vomiting, blurring of vision, seizures, and focal neurological deficits, suggestive of raised intracranial pressure secondary to an intracranial space-occupying lesion.

🤲 One-Line Summary – Parkinson Disease
Abnormal Presentation

Mr./Ms. ______, a __-year-old individual, presented with gradually progressive resting tremor, bradykinesia, rigidity, shuffling gait, and postural instability, suggestive of Parkinson disease.

🧬 One-Line Summary – Guillain–Barré Syndrome
Abnormal Presentation

Mr./Ms. ______, a __-year-old individual, presented with rapidly progressive ascending symmetrical weakness of both lower limbs progressing to the upper limbs following a recent febrile illness, with absent bladder involvement initially, suggestive of Guillain–Barré syndrome.

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