Neurologic Exam Key Points

Overview of Neurologic Exam

• Focus on assessment of motor and sensory functions of cranial nerves.

Cranial Nerves

• Understanding of various cranial nerves and their functions is key.
• Not all functions can be assessed in a physical exam.

Motor and Sensory Functions

• Important to differentiate between motor and sensory functions when assessing cranial nerves.

Coordination Assessment

• Limb Ataxia vs Gait Ataxia:
  • Limb Ataxia: Ataxia due to cerebellar problems.
  • Gait Ataxia: Differentiating between cerebellar ataxia versus sensory ataxia (peripheral nervous system issues).

Tremor Assessment

• Types of tremors:
  • Resting Tremor: Occurs at rest, often associated with conditions like Parkinson's disease.
  • Action Tremor: Occurs with voluntary movement.

Higher Cortical Function Tests

• Assessment of cortical sensation.
• Importance of mental status evaluation (e.g., dementia vs. delirium).

Meningitis Tests

• Historical tests used in meningitis, noted for having limited utility in bedside diagnosis.

Cranial Nerve Function Assessments

• Accessory Nerve (Cranial Nerve XI): Assessing shoulder shrugging is the function of this nerve.
• Common misidentifications of other functions:
  • Sticking out the tongue: Assessing Hypoglossal Nerve (Cranial Nerve XII).
  • Biting down: Assesses Trigeminal Nerve (Cranial Nerve V).
  • Midline uvula assessment: Related to Glossopharyngeal (Cranial Nerve IX) and Vagal Nerve (Cranial Nerve X).

Cerebellar Function Assessment

• Common tests used to assess cerebellar function include:
  • Distidokinesia: Tests coordination.
  • Finger-Nose-Finger Test: Assesses coordination and finger placement.
  • Heel-Shin Test: Evaluates coordination.

Incorrect Assessment for Cerebellar Function

• Romberg Test: Used for assessing sensory ataxia (not cerebellar function); relies on proprioceptive input and balance.
• Conclusion: Romberg is not used to assess cerebellar functions directly, which focus on coordination.