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Anatomy: Arm

Upper extremity one liners

QuestionAnswer
Most frequently fractured bone of body Clavicle
Most frequently dislocated carpal bone Lunate
Most frequently fractured carpal bone Scaphoid
Osseous structure palpated deep to “anatomical snuff box” Scaphoid
Fracture of distal radius that produces “dinner fork” appearance Colles’ fracture
Nerve injured with fracture of surgical neck of humerus Axillary
Nerve injured with fracture of shaft of humerus Radial
Nerve injured that results in wrist drop Radial
Nerve injured with fracture of medial humeral epicondyle Ulnar
Muscle that is the chief flexor and chief extensor at shoulder joint Deltoid
Muscles innervated by axillary nerve Deltoid and teres minor
Muscle that initiates abduction of arm Supraspinatus
Most commonly torn tendon of rotator cuff Supraspinatus
Two muscles that rotate scapula for full abduction of arm Trapezius and serratus anterior
Tendon that courses through shoulder joint Long head of biceps
Chief supinator muscle of hand Biceps brachii
Primary (major) flexor of the forearm Brachialis
Orientation of structures located in the cubital fossa-Lateral to Medial Tendon biceps brachii, brachial a.,median n.
Injury to what nerve causes winged scapula Long thoracic nerve
Spinal levels of axillary nerve C5 and C6
Spinal levels of innervation to muscles of the hand C8 and T1
Dermatome of thumb C6
Nerve to thenar compartment Recurrent branch of Median
Innervation of adductor pollicis Ulnar (deep br.)
Innervation to all interosseous muscles Ulnar (deep br.)
Innervation to nail bed of middle finger Median nerve
Innervation to nail bed of ring finger Ulnar and median
Region affected by upper trunk injury of brachial plexus (C5-C6) Shoulder
Region affected by lower trunk injury of brachial plexus (C8-T1) Intrinsic hand muscles
Nerve compressed with carpal tunnel syndrome Median
Nerve affected by cubital tunnel syndrome Ulnar
Paralysis of which muscles results in total “claw” hand Lumbricals
Created by: tessah10
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