Ask yourself throughout if the pathology is:
By the time you get to the sensory exam you should know what you are expecting to find and use it to confirm or narrow down differentials (see neurology differentials).
Want to find out how 99% of people passed their exams?
Test one joint at a time and compare sides. Always support the joint being tested with one hand (use it as a lever). Use all your strength!
Hip flexion (L2/L3) | Patient should raise their leg off the bed with knee fully extended. Stabilise contralateral hip joint with one hand and push down on the quadriceps just above the knee of the raised leg. ‘Don’t let me push your leg down.’ |
Hip extension (L4/L5) | With the same leg still raised to about 30˚, stabilise the ipsilateral hip joint with one hand and hold the underside of the patient’s knee with the other hand. ‘Push my hand down into the bed.’ |
Knee extension (L3/L4) | With the patient’s knee flexed to about 90˚, stabilise the joint with one hand and hold the anterior side of their ankle with your other hand and try to push it towards them. ‘Try and kick your leg out. Don’t let me push it towards you.’ |
Knee flexion (L5/S1) | In the same position, but holding the posterior side of their ankle, try and pull it away. ‘Try and pull your heel towards your bottom. Don’t let me pull it away.’ |
Ankle dorsiflexion (L4/L5) | With their leg straight on the bed and their ankle actively dorsiflexed, stabilise the ankle with one hand. Make a fist with your other and use the dorsal side of your fist to try and push the patient’s foot downwards. ‘Point your foot up towards your head. Don’t let me push it down.’ |
Ankle plantar-flexion (S1/S2) | With their leg straight on the bed and their ankle actively plantar-flexed, try to pull it up with your fingers around the ball of the patient’s foot. ‘Point your foot downwards towards the bottom of the bed. Don’t let me pull it up.’ |
Big toe extension (purely L5) | With their big toe actively flexed, isolate the toe’s metatarsophalangeal joint with one hand and try to push it down with the index and middle fingers of your other hand. ‘Point your big toe up towards your head. Don’t let me push it down.’ |
5 = full power
4 = some resistance
3 = GRAVITY
2 = gravity eliminated
1 = flicker of muscle contraction
0 = nothing.
Hold the tendon hammer by the end of the plastic rod to make a pendulum-like swing. Ensure the patient is fully relaxed. If you cannot elicit a reflex, ask them to close their eyes and grit their teeth when you strike the tendon. Reflexes may be brisk, normal, reduced or absent.
Patellar (L3/4)
Patellar = L3, 4 kick the door
Ankle (S1/2)
Ankle = S1, 2 in the shoe
Plantar (Babinski)
Heel-to-shin test
A patient presents to ED with chest pain and this trace. What would you do?
Interpretation management
For pain and light touch, first show the patient how each should feel on their sternum, then start distally. If there is distal sensory loss or if from the motor exam you suspect ‘glove and stocking’ sensory loss, or a sensory-level, test from distal to proximal in 2-3 straight lines. If distal sensation is intact, or if from the motor exam you suspect nerve/nerve root pathology, test dermatomes ± peripheral nerves:
Pain (spinothalamic)
Light touch (dorsal column)
For the modalities below, start distally and only move proximally if the patient cannot feel you:
Proprioception (dorsal column)
Vibration (dorsal column)
Temperature (spinothalamic)
Oops! This section is restricted to members. Click here to signup!
List 3 causes of a bilateral upper motor neurone lesion
Oops! This section is restricted to members. Click here to signup!
What would be your differential diagnosis for a sensorimotor polyneuropathy?
Oops! This section is restricted to members. Click here to signup!
Which conditions may result in a unilateral upper motor neurone lesion?
Oops! This section is restricted to members. Click here to signup!
What are the causes and clinical features of a Brown-Sequard syndrome?
Oops! This section is restricted to members. Click here to signup!
Boost your productivity with an OSCEstop membership
📖 All OSCE Lerning
📟 OSCE stations
🔋 Qbank
💡 Conditions
Picture references
Charcot-Marie-Tooth foot: Benefros, 2004. Licenced under the Creative Commons Attribution-Share Alike 3.0 Unported license (https://creativecommons.org/licenses/by-sa/3.0/deed.en) and GNU Free Documentation licence (https://commons.wikimedia.org/wiki/Commons:GNU_Free_Documentation_License,_version_1.2). Sourced from: https://commons.wikimedia.org/wiki/File:Charcot-marie-tooth_foot.jpg
Boost your productivity with an OSCEstop membership
📖 All OSCE Lerning
📟 OSCE stations
🔋 Qbank
💡 Conditions