musculoskeletal Flashcards
(8 cards)
L4-s2 motor, sensory and injury
COMMON PERONEAL
Injury: fibula neck fracture, compression of nerve of fibula
Sensory: anterior and lateral leg
Motor: eversion of foot, dorsi flexion and toe extension
Nerve roots for the leg
L2-L4- sensory, motor, injury
OBTURATOR
sensory: medial thigh
Motor:obturator does thigh adduction
FEMORAL
sensory: medial thigh, knee and medial leg
Motor: thigh flexion and leg extension
injury- iatrogenic with pelvic surgery or anterior hip dislocation for obturator, for femoral, pelvic fracture or iliopsoas/ iliacus mass such as an abscess or hematoma.
L4-S3 injury, sensory and motor
Tibial nerve
Injury- knee trauma
Sensory- dorsum of foot
Motor- foot inversion, plantar flexion, toe flexion
L4-s1 superior and L5-s2 inferior
SUPERIOR GLUTEAL
Injury- iatrogenic usually due to posterior hip dislocation or buttocks injection
Radial Nerve Pathway
-Nursemaid Elbow
- Nerve arises in posterior cord of plexus
- Innervates posterior or extensor compartment muscles
- Then enters forearm
- At lateral epicondyle (humerus and radius articulate here), divides into deep and superficial
- SUPERFICIAL is PURELY SENSORY. Radial half of dorsal hand (except distal first to third digits which is by lateral and medial branches of the median nerve)
Nursemaid Elbow or Radial head subluxation happens with sudden outward pulling on an extended and pronated arm. Damages DEEP branch of radial nerve hence weak/paralysed forearm extensor muscles. WRIST DROP!!! No sensory loss
Ulnar nerve distal pathway
Through hook of hamate and pisiform bone in a fibroosseus tunnel (Guyons canal). Injury here leads to dysesthesias at ulnar side of hand and weak intrinsic muscles of the hand
Coracobradialis
- Arm flexor.
- Deep to biceps brachii,
- Overlies median nerve and brachial artery
- Musculocutaneous nerve innervated
Fracture of surgical neck of deltoid
Axillary nerve injury
Deltoid Paralysis
Teres minor paralysis
Loss of sensation in the lateral upper arm
