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Damage to the posterior arch of the atlas vertebra would most likely endanger?
The vertebral artery
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Which of the muscles receive(s) innervation derived from the posterior division or cord of the brachial plexus?
All of the following: latissimus dorsi, deltoid, extensor carpi radialis longus, teres major
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To determine if the recurrent branch of the median nerve is injured, one should test:
opposition of thumb - opposed by opponens pollicis m.
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Which nerve or artery are most likely to be damaged by a fracture of the medial epicondyle of the humerus?
ulnar nerve
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The dorsal scapular artery provides the principal blood supply to:
rhomboid major muscle
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The area most in jeopardy because of loss of the common interosseous artery is:
Extensor compartment of forearm
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The biceps brachii muscle can:
flex the forearm, flex the arm. supinate
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A patient with severe injury to his arm displays the following functional deficits: very weak flexion of forearm, some weakness in flexion of the arm, and severe weakness in supination. The damaged nerve is the:
musculocutaneous nerve - innervates the Coracobrachialis, Biceps Brachii, and Brachialis muscles.
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Deep fascia over forearm extensors:
attaches to radius and ulna AND is important in helping venous blood in conjunction with muscle activity to return
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Branches from the medial cord of the brachial plexus are derived primarily from:
C8 and T1
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Extension at the metacarpophalangeal joints is accomplished by :
extensor digitorum (communis), extensor indicis proprious and extensor difiti minimi mm.
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Flexion as the metacarpophalangeal joints is accomplished by the:
- Flexor digitorum superficialis and profundus, lumbricals, and interossei.
- In the case of the little finger is assisted by the flexor digiti minimi brevis
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Flexion of thumb is accomplished by:
Flexors pollicis longus and brevis
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Extension of thumb is accomplished by:
extensors pollicis longus and brevis
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The only muscle capable of flexing the distal interphalangeal joints of each of the four fingers (2-5):
Flexor digitorum profundus
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A dermatome is defined as the area of skin supplied by:
dorsal root of a spinal nerve
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In attempting to anesthetize areas supplied by the-median nerve distal to the wrist, an injection should be attempted:
lateral to the tendon of the palmaris longus
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The' ligamenta flava attach:
vertebral laminae
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The nerve which is geographically most closely related to the brachial artery in the cubital fossa is the:
median nerve
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a membrane firmly attached to spinal cord
pia matter
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contains CSF
subarachnoid space
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contains a complex system of veins and some fatty tissue
epidural space
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continuous with the epineurium of peripheral nerves
dura mater
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contains muscle which can flex the arm
anterior axillary fold
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subscapularis muscle
posterior axillary fold
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connects supraspinous fossa with infraspinous fossa
great scapular notch
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pectoralis major muscle where is it?
anterior axillary fold
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bony landmark associated with namng the three portions of the axillary artery
coracoid process of scapula
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Which nerve(s) can be responsible for sensation on the dorsolateral aspect of the hand?
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The subscapularis muscle:
- receives a nerve or nerves from the posterior cord of the brachial plexus
- forms part of the posterior wall of the axilla
- is a 'rotator cuff': muscle and holds the humerus in the glenoid fossa
- rotates the humerus medially
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Which of the following arteries are commonly direct branches of the axillary artery?
- circumflex scapular
- transverse cervical
- suprascapular
- thoracoacromial
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Which of the following contribute to "winged scapula"?
- paralyzed serratus anterior muscle
- a damaged long thoracic nerve
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A fractured clavicle could easily damage the
- suprascapular nerve
- suprascapular artery
- nerve to subclavious muscle
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The superficial palmar arch
- usually has a small anastomotic. connection to the radial artery
- is a continuation of the ulnar artery
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Structures that can be felt in the anatomical snuff box include the:
- radial artery
- scaphoid bone
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The pyramidal space between the arm and the upper throax is known as the axilla
- and its medial wall consists of ribs and intercostal muscles covered by serratus anterior muscle
- and at its apex it transmits all the vessels and nerves to the upper limb
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The intrinsic muscles of the back perform which of the following functions:
- bend the vertebral column laterally
- extend the vertebral column
- pull the head backward (extend)
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Best use of the triangle of auscultation is obtained when the scapula is protracted. Protractlon of the scapula is performed mainly by the following muscle(s):
Serratus anterior
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Which of the following contribute significantly to collateral circulation around the scapula?
- transverse cervical artery
- subscapular artery
- suprascapular (transverse) scapular
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The lumbrical muscles
- have no bony origin
- extend the interphalangeal joints
- insert on the extensor expansion
- flex the metacarpophalangeal joints
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The floor of the posterior cervical triangle is composed of:
prevertebral fascia
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A crush injury to the wrist can damage the ulnar nerve. Which of the following would be the result of such an injury?
- anesthesia of the palmar surface of the medial third of the hand
- paralysis of the dorsal interossei
- paralysis of the hypothenar muscles
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A young automobile accident is brought to the emergency room. Radiographs show that her humerus is fractured (partially) at the surgical neck. The patient shows loss of cutaneous sensibility to the skin over the deltoid muscle.
1) Loss of sensibility suggests trauma to which of the fnllowing nerves in the vicinity of the fracture?
2) The patient is able to raise (abduct) her arm to a 15o position but not farther. This suggests paralysis of which muscle?
3) The muscle (unaffected) which is responsible for the initial abduction of the arm to 15o
4) The unaffected muscle receives its motor nerve supply from:
5) A vessel, accompanying the traumatized nerve, which may also be damaged is:
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- 1) axillary
- 2) deltoid
- 3) supraspinatus
- 4) suprascapular nerve
- 5) posterior humeral circumflex artery
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Eversion of the foot is under control of the:
peroneal nerve
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The second lumbrical muscle in the foot:
is supplied by the medial plantar nerve
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Muscles which can flex the knee joint include:
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The posterior compartment of the thigh:
- is supplied by the sciatic nerve
- is supplied by perforating arteries
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While standing quietly, the medial longitudinal plantar arch is being supported by:
- plantar calcaneonavicular ligament
- plantar aponeurosis
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Muscles attaching to the interosseous membrane in the leg include:
- Tibialis anterior
- Tibialis posterior
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