Flexors/Extensors
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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Originate above, or proximal to, the wrist joint and assist in wrist function but primary function is fingers and thumb function | show 🗑
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Smaller muscles that originate within the hand (at or distal to the carpal bones). Can be subdivided into the thenar, hypothenar, and deep palm muscles | show 🗑
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show | Carpal Tunnel Syndrome
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show | Colles’ Fracture
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Fall on the back of the hand fracture | show 🗑
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Compression of the median nerve | show 🗑
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Inflammation of the sheath of the extensor pollicis brevis and abductor pollicis longus | show 🗑
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True of False? Ulna does not rotate | show 🗑
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True of False? Radius moves around the ulna | show 🗑
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show | The humerus and forearm are not aligned in a perfectly straight line, they actually form a slight lateral angle at the joint
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show | This is because the trochlea is lower than the capitulum at the distal end of the humerus.
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Three bony landmarks of the Scapula? | show 🗑
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show | 1. Trochlea (articulates with the ulna)
2. Capitulum (articulates with the radius)
3. Medial and lateral epicondyle
4. Lateral supracondylar ridge
5.Olecranon fossa (posterior – articulates with the ulna)
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Three bony landmarks of the Radius? | show 🗑
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1. Between radius and ulna 2. Keeps the two bones from separating 3. Provides more surface area for muscles attachment | show 🗑
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show | O – Distal half of the
humerus, anterior
surface
I – Coronoid process and
ulnar tuberosity of the
ulna
A – Elbow flexion
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Biceps Brachii | show 🗑
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show | O– Lateral supracondylar
ridge on the humerus
I - Styloid process of the
radius
A- Elbow flexion
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show | O – 1. Long head – Infraglenoid tubercle of the scapula
2. Lateral head – inferior to greater tubercle on the posterior humerus
3. Medial head – Posterior humerus
I – Olecranon process of
the ulna
A – Elbow extension
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show | O – Medial epicondyle of
the humerus and
coronoid process of
the ulna
I – Lateral aspect of the
radius
A – Pronation of forearm
and assists with
elbow flexion
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Pronator Quadratus Muscle | show 🗑
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show | O – Lateral epicondyle of
humerus and
adjacent ulna
I – Anterior surface of
the proximal radius
A – Supination of
forearm
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Lateral epicondylitis/ Tennis Elbow | show 🗑
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show | Affects the common flexor tendon that inserts medial epicondyle of the humerus
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show | Biceps Brachii, Brachialis, Brachioradialis
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show | Triceps
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show | Pronator Teres and Quadratus
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Supination Muscles? | show 🗑
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show | 1.Wrist flexion
2. Wrist extension
3. Ulnar deviation
4. Radial deviation
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show | 3 muscles:
1. Flexor carpi radialis
2. Flexor carpi ulnaris
3. Palmaris longus
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Flexor Carpi Radialis | show 🗑
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show | O: Medial epicondyle of
humerus
I: Palmar fascia
A: Wrist flexion
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show | O: Medial epicondyle of
humerus
I: Pisiform, and base of 5th
Metacarpal
A: Wrist flexion and ulnar
deviation
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show | 3 muscles:
1. Extensor carpi radialis longus
2. Extensor carpi radialis brevis
3. Extensor carpi ulnaris
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show | O: Supracondylar ridge
of humerus
I: Base of 2nd metacarpal
bone
A: Wrist extension and radial
deviation
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show | O: Lateral epicondyle of
humerus
I: Base of 3rd metacarpal
A: Wrist extension
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Extensor Carpi Ulnaris | show 🗑
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CANCEL OUT : FLEXION | show 🗑
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show | EXTENSOR CARPI ULNARIS
EXTENSOR CARPI RADIALIS LONGUS
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CANCEL OUT : ULNAR DEVIATION | show 🗑
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CANCEL OUT : RADIAL DEVIATION | show 🗑
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