focal weakness Flashcards
Foot drop is …
patient presenting with difficulty picking foot up and subsequently circumlocution to avoid tripping over,
may present with recurrent falls
prolapsed intervertebral disc causes:
lumbar nerve root lesion
1 symptom and 1 sign of prolapsed L4/L5 intervertebral disc
significant back pain
loss of ankle reflex
S1 compression leads to loss of what reflex?
ankle
muscles innervated by L5
- tibialis anterior
- tibialis posterior
- peroneal longus + brevis
L5 lesion results in loss of which movements
- foot inversion
- dorsiflexion
what movement/position can lead to peroneal nerve palsy
Prolonged kneeling
why is CPN palsy a risk of prolonged knee flexion
The nerve winds round the fibular head and is susceptible to compression here
muscles innervated by the common peroneal nerve: and the movements they produce
- tibialis anterior: ankle dorsiflexion
- peroneal muscles: eversion of foot
Nerve Palsy investigations
Nerve conduction studies
Management of Foot drop
- Foot drop splint
- electrical nerve stimulation
- ankle foot orthosis
- Physiotherapy
gait with CPN palsy
high stepping gait
with
circumduction
causes of wrist drop
radial nerve palsy
due to compression of the radial nerve against mid shaft of humerus
position causing wrist drop
arm draped over back of chair for several hours “saturday night palsy”
sensation affected in radial nerve palsy
anatomical snuffbox
