Upper Limb — Flashcards

Flashcard 11: Injury to the _____ nerve (C8-T1 (nerve roots)) commonly occurs due to:- fracture of the medial epicondyle of humerus "funny bone" (proximal lesion) - fractured hook of hamate (distal lesion) (from fall on outstretched hand - "FOOSH")

Answer: ulnar

Flashcard 12: Muscles lost in Klumpke palsy include the _____:1. lumbricals2. interossei3. hypothenar4. thenar

Answer: intrinsic hand muscles

Flashcard 13: The _____ abducts the arm from 0 to 15 and is innervated by the suprascapular nerve.

Answer: supraspinatus

Flashcard 14: The _____ muscle abducts the arm from 15° to 90° and is innervated by the axillary nerve.

Answer: deltoid

Extra: Abduction of the arm: - 0–15°: Supraspinatus - 15–90°: Deltoid - >90°: Serratus anterior and Trapezius (scapular rotation) The deltoid also assists in flexion/medial rotation (anterior fibers) and extension/lateral rotation (posterior fibers).

Flashcard 15: Clawing of the hand is characterized by _____ at the MCP joint, flexion at the PIP joint, and flexion at the DIP joint.

Answer: extension

Flashcard 16: Before the median nerve enters the wrist / hand within the _____, it travels through the forearm between the flexor digitorum superficialis and the flexor digitorum profundus

Answer: flexor retinaculum

Flashcard 17: _____ (condition) is due to traction or tear of the lower trunk (C8-T1 roots).

Answer: Klumpke palsy

Flashcard 18: A lesion to the #_____ cord would result in wrist drop, paralysis of the deltoid, and impairment of internal rotation of the humerus

Answer: 3 - posterior

Flashcard 19: Flexor pollicis _____ flexes the metacarpophalangeal joint and is supplied by the (recurrent motor branch of) median nerve

Answer: brevis

Flashcard 20: Injury to the _____ nerve (C5-T1) Causes: - Midshaft fracture of the humerus - Compression of the axilla Clinical features: - Wrist drop - Finger drop

Answer: radial