Term
| Muscles of the Anterior Compartment of the Forearm Deep (3) and Superficial (5) |
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Definition
Deep
Flexor digitorum profundus
Flexor pollicis longus
Pronator Quadratus
Superficial
Pronator Teres
Flexor Carpi Radialis
Palmaris Longus
Flexor Carpi Ulnaris
Flexor Digitorum Superficialis |
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Term
| Deep (5) and Superficial (6) Muscles of the Posterior Compartment of the Forearm |
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Definition
Superficial
Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum
Extensor digiti minimi
Extensor carpi ulnaris
Deep
Supinator
Abductor pollicis longus
Extensor pollicis brevis
Extensor pollicis longus
Extensor indicis |
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Term
| Pronator Teres Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Ulnar head: coronoid process of ulna Humeral head: medial epicondyle of humerus
I: Middle of lateral surface of radius
N: Median Nerve
A: Pronates and Flexes forearm
B: ulnar artery and radial artery |
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Term
| Flexor Carpi Radialis Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Medial epicondyle of humerus
I: Base of 2nd metacarpal
N: Median Nerve
A: Flexes and abducts hand
B: Ulnar Artery |
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Term
Palmaris Longus Origin, Insertion, Innervation, Action, Blood Supply
(10% of population missing this muscle--myself included!) |
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Definition
O: Medial epicondyle of humerus
I: Distal half of flexor retinaculum, apex of palmar aponeurosis
N: Median Nerve
A: Flexes hand
B: Ulnar artery |
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Term
| Flexor Carpi Ulnaris Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Medial epicondyle of humerus
I: Base of 5th metatarsal
N: Ulnar Nerve
A: Ulnar Deviation, Flexion of the Wrist
B: Ulnar Artery |
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Term
| Flexor Digitorum Superficialis Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Humeroulnar head: medial epicondyle of humerus, coronoid process of ulna Radial head: superior half of anterior border of radius
I: Shafts of middle phalanges of 2nd-5th fingers
N: Median Nerve
A: Flexes middle phalanges at proximal interphalangeal joints (all fingers except thumb)
B: Ulnar Artery |
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Term
| Flexor Digitorum Profundis Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Anterior surface of ulna, interosseous membrane
I: Bases of distal phalanges of 2nd-5th fingers
N: Medial part: ulnar nerve
Lateral part: median nerve
A: Flexes distal phalanges at distal interphalangeal joints (all fingers except thumb)
B: Anterior interosseous artery |
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Term
| Flexor Pollicis Longus Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Anterior surface of radius, interosseous membrane
I: Base of distal phalanx of thumb
N: Median nerve
A: Flexes phalanges of thumb
B: Anterior interosseous artery |
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Term
| Pronator Quadratus Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Distal quarter of anterior surface of ulna
I: Distal quarter of anterior surface of radius
N: Median nerve
A: Pronates forearm
B: anterior interosseous artery |
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Term
| Brachioradialis Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Lateral supraepicondylar ridge of humerus
I: Lateral surface of radius proximal to styloid process
N: Radial Nerve
A: Weak flexion of the forearm
B: Radial recurrent artery |
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Term
| Extensor Carpi Radialis Longus Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Lateral supraepicondylar ridge of humerus
I: Base of 2nd metacarpal
N: Radial Nerve
A: Extends and abducts hand
B: Radial artery |
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Term
| Extensor Carpi Radialis Brevis Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Lateral epicondyle of humerus
I: Base of 3rd metacarpal
N: Radial Nerve
A: Extends and abducts hand
B: Radial Artery |
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Term
| Extensor Digitorum Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Lateral epicondyle of humerus
I: Extensor expansions of 2nd-5th fingers
N: Radial Nerve
A: Extends 2nd-5th fingers at metacarpophalangeal joints
B: Interosseous recurrent and posterior interosseous arteries |
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Term
| Extensor Digiti Minimi Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Lateral epicondyle of humerus
I: Extensor expansion of 5th finger
N: Radial Nerve
A: Extends 5th finger at metacarpophalangeal joint
B: Interosseous recurrent artery |
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Term
| Extensor Carpi Ulnaris Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Lateral epicondyle of humerus
I: Base of 5th metacarpal
N: Radial Nerve
A: Extends and adducts hand
B: Ulnar Artery |
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Term
| Supinator Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Lateral epicondyle of humerus, radial collateral and anular ligaments, supinator fossa, crest of ulna
I: Lateral posterior and anterior surfaces of proximal 1/3 of radius
N: Radial Nerve
A: Supinates forearm (as if you didn't know that)
B: Recurrent interosseous artery |
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Term
| Abductor Pollicis Longus Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Posterior surface of proximal 1⁄2 of ulna, radius and interosseous membrane
I: Base of 1st metacarpal
N: Radial Nerve
A: Abducts thumb, extends thumb at carpometacarpal joint
B: Posterior interosseous artery |
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Term
| Extensor Pollicis Brevis Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Posterior surface of distal 1/3 of radius, interosseous membrane
I: Base of proximal phalanx of thumb
N: Radial Nerve
A: Extends proximal phalanx of thumb at metacarpophalangeal joint
B: Posterior interosseous artery |
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Term
| Extensor Pollicis Longus Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Posterior surface of middle 1/3 of ulna, interosseous membrane
I: Base of distal phalanx of thumb
N: Radial Nerve
A: Extends distal phalanx of thumb at interphalangeal joint
B: Posterior interosseous artery |
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Term
| Extensor Indicis Origin, Insertion, Innervation, Action, Blood Supply |
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Definition
O: Posterior surface of distal 1/3 of ulna, interosseous membrane
I: Extensor expansion of 2nd finger
N: Radial Nerve
A: Extends 2nd finger
B: Posterior interosseous artery |
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Term
| What do all of the muscles of the posterior compartment of the forearm have in commmon? |
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Definition
| They are ALL innervated by the Radial nerve |
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Term
| Superificial Muscles of the forearm from medial to lateral |
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Definition
Brachioradialis
Protator Teres
Flexor Carpi Radialis
Palmaris Longus
Flexor Carpi Ulnaris
Deep to them but still considered superficial
Flexor Digitorum Superficialis |
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Term
| Three Deep Muscles of the Anterior Forearm from Medial to Lateral |
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Definition
Flexor Digitorum Profundis
Flexor Policis Longus
Pronator Quadratus (Distal and Deep to FPL) |
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Term
The Ulnar Nerve Innervates What Two (one and a half) Muscles of the Anterior Forearm?
All of the other muscles of the Anterior Forearm are innervated by...?
How is this reversed when in the hand? |
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Definition
Flexor Carpi Ulnaris
Flexor Digitorum Profundus (Medial Half)
(runs inbetween these to muscles, FCU is superior)
all of the other anterior forearm muscles are innervated by the Median nerve
This is mostly reversed when in the hand in that the Median nerve innervates
one half of the lumbricals (the index and middle fingers)
and the three thenar muscles (Abductor pollicis brevis, flexor pollicis brevis, & opponens pollicis) |
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Term
| What are colles and reverse colles fractures? |
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Definition
| Colles’s fracture of the wrist is a distal radius fracture in which the distal fragment is displaced (tilted) posteriorly, producing a characteristic bump described as dinner (silver) fork deformity because the forearm and wrist resemble the shape of a dinner fork. If the distal fragment is displaced anteriorly, it is called a reverse Colles’s fracture (Smith’s fracture). |
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