Applied Anatomy, Physiology and Pathophysiology
What this domain tests
Whether you can connect structure to function and lesion to presentation, then use that link to choose a safe intervention. Expect applied questions, not isolated labelling.
Core rules
- Localise by pattern: which nerve, root, muscle or vascular territory explains all the findings, not just one.
- Distinguish upper from lower motor neuron signs, and peripheral nerve from root lesions.
- Link pathophysiology to precautions: recent myocardial infarction, uncontrolled hypertension and active infection change what is safe today.
- Respect dermatomes and myotomes when interpreting sensory loss and weakness.
- Remember oxygen delivery, perfusion and healing as constraints on every therapy.
Worked example
A patient reports numbness of the thumb, index, middle and half the ring finger, worse at night, with wasting of the thenar eminence. That pattern fits median nerve compression at the wrist, not a C6 root lesion, because a root lesion would show neck pain, reflex change and a broader myotomal picture. The reasoning drives the assessment: Phalen and Tinel tests, grip and pinch measures, and night-splint education rather than cervical traction.
Traps that cost marks
- Calling any weakness a nerve injury without checking myotomes and reflexes.
- Ignoring the cardiovascular and respiratory baseline when planning exertion.
- Confusing referred pain with a local lesion.
- Missing a bilateral or progressive pattern that suggests a central cause.