Cranial Nerve Examination Details
Cranial Nerve Test Overview
Introduction to cranial nerve examination
- The cranial nerve test involves assessing all 12 cranial nerves in a patient.
Observation of Sensation
- Scenario: The examiner touches the right cheek of a patient.
- Finding: The patient reports no sensation in the right cheek.
- Discussion Prompt: "Where's the lesion?"
Identification of Affected Cranial Nerve
- Participants engage in a discussion to identify the nerve responsible for facial sensation.
- Cranial Nerve Numbers:
- Trigeminal nerve is identified as cranial nerve number five.
- Responsible for sensations across the face.
- Conclusion: If there is loss of sensation in the right cheek, the lesion is in the Trigeminal Nerve (CN V).
Another Clinical Scenario
- Presentation of a patient with recurring headaches.
- Diagnostic Imaging: MRI conducted with no abnormalities noted.
- Test Given: Patient is asked to stick out their tongue.
- The patient sticks their tongue to the left instead of the right.
- Discussion: This behavior suggests lesion involvement in the Hypoglossal Nerve (CN XII).
Additional Information on Columns and Test Structure
- Suggested format for documenting findings:
- Create a table with six columns.
- Each column represents details about cranial nerves from one through twelve.
- Include information such as:
- Name
- Number
- Function (motor/sensory/both)
- Origin
- Destination
- Diagnostic considerations
Specific Testing of Cranial Nerves
- Diagnostic tests carried out should be based on previously learned material.
- Example: Assessing the Trigeminal Nerve functionally includes checks for:
- Sensory function:
- Evaluation of sensation in the face (including cheeks and jaw).
- Motor function:
- Observations on mastication (chewing ability).
Closing Discussion and Interaction
- The examiner encourages questions and engagement from participants.
- Recognition of distractions but encourages focus on the subject matter.