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Muscle origin and insertions > Elbow, forearm and wrist > Flashcards

Elbow, forearm and wrist Flashcards

1
Q

Biceps Brachii
Short and Long
Head

A

Origin: SH: coracoid process of scapula.
LH: Supraglenoid tubercle of scapula.
Insertion: Radial tuberosity and antebrachial fascia.
Action: Supinates forearm; flexes forearm at elbow joint, most effectively when the
forearm is supinated.
Innervation: Musculocutaneous nerve (C5-C6).

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2
Q

Brachialis

A

Origin: Anterior aspect of distal half of humerus.
Insertion: Coronoid process and tuberosity of ulna.
Action: Flexes forearm at elbow joint.
Innervation: Musculocutaneous (C5-C6)
and Radial (C7) nerves.

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3
Q

Brachioradialis

A 
Origin: Superior two thirds of lateral
supracondylar ridge of humerus.
Insertion: Lateral aspect of distal part of radius.
Action: Flexes forearm at elbow joint.
Innervation: Radial nerve (C5-C6).
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4
Q

Extensor Carpi
Radialis
Longus

A 
Origin: Inferior one third of lateral
supracondylar ridge of humerus.
Insertion: Dorsal aspect of base of second
metacarpal bone.
Action: Extends hand at radiocarpal (wrist)
joint; abducts hand at radiocarpal and
midcarpal joints.
Innervation: Radial nerve (C6-C7).
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5
Q

Extensor Carpi

Radials Brevis

A

Origin: Lateral epicondyle of humerus, via
common extensor tendon.
Insertion: Dorsal aspect of base of third metacarpal bone.
Action: Extends hand at radiocarpal (wrist)
joint; abducts hand at radiocarpal and midcarpal joints.
Innervation: Deep branch of radial nerve
(C7-C8) and posterior antebrachial
interosseous nerve (C7-C8).

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6
Q

Extensor

Digitorum

A

Origin: Lateral epicondyle of humerus, via
common extensor tendon.
Insertion: Dorsal aspects of bases of both
the middle and distal phalanges of the
index, middle, ring, and little fingers.
Action: Extends index, middle, ring, and little fingers.
Innervation: Posterior antebrachial
interosseous nerve (C7-C8).

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7
Q

Extensor

Digiti Minimi

A

Origin: Lateral epicondyle of humerus, via
common extensor tendon.
Insertion: Extensor expansion of little finger.
Action: Extends little finger.
Innervation: Posterior antebrachial
interosseous nerve (C7-C8).

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8
Q

Extensor

Carpi Ulnaris

A 
Origin: Lateral epicondyle of humerus, via
common extensor tendon, and posterior
border of ulna.
Insertion: Medial aspect of base of fifth
metacarpal bone.
Action: Extends and adducts hand at
radiocarpal (wrist) joint.
Innervation: Posterior antebrachial
interosseous nerve (C7-C8).
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9
Q

Supinator

A

Origin: Lateral epicondyle of humerus,
supinator crest and supinator fossa of ulna.
Insertion: Anterior, lateral, and posterior
aspects of proximal one third of radius.
Action: Supinates forearm at radioulnar joints.
Innervation: Posterior antebrachial
interosseous nerve (C6-C7).

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10
Q

Pronator Teres

A

Origin: Medial supracondylar ridge of
humerus, via the common flexor tendon,
and medial aspect of coronoid process of ulna.
Insertion: Middle one third of anterolateral
aspect of radius.
Action: Pronates forearm at radioulnar joints.
Innervation: Median nerve (C6-C7).

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11
Q

Flexor Carpi

Radialis

A 
Origin: Medial epicondyle of humerus, via
common flexor tendon.
Insertion: Palmar aspects of bases of
second and third metacarpal bones.
Action: Flexes hand at radiocarpal (wrist)
joint; abducts hand at radiocarpal and
midcarpal joints.
Innervation: Median nerve (C6-C7)
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12
Q

Palmaris

Longus

A

Origin: Medial epicondyle of humerus, via
common flexor tendon.
Insertion: Palmar aponeurosis and flexor
retinaculum of hand.
Action: Flexes hand at radiocarpal (wrist)
joint; stabilizes palmar aponeurosis.
Innervation: Median nerve (C7-C8).

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13
Q

Flexor
Digitorum
Superficialis

A

Origin: Medial epicondyle of humerus, via
the common flexor tendon, sublime
tubercle of ulna, and proximal half of
anterior border of radius.
Insertion: Palmar aspects of the bodies of
middle phalanges of the index, middle,
ring, and little fingers.
Action: Flexes index, middle, ring, and little fingers.
Innervation: Median nerve (C7-T1).

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14
Q

Flexor Carpi

Ulnaris

A

Origin: Medial epicondyle of humerus, via
common flexor tendon, proximal two thirds
of body of ulna, and olecranon of ulna.
Insertion: Pisiform, hook of hamate, and
palmar aspect of base of fifth metacarpal bone.
Action: Flexes and adducts hand at
radiocarpal (wrist) joint.
Innervation: Ulnar nerve (C7-T1).

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15
Q

Flexor
Digitorum
Profundis

A

Origin: Medial aspect of coronoid process
of ulna and superior three quarters of
anterior and medial surfaces of body of ulna.
Insertion: Palmar aspects of bases of the
distal phalanges of index, middle, ring, and little fingers.
Action: Flexes index, middle, ring, and little fingers.
Innervation: Medial part: ulnar nerve C8
T1); Lateral part: anterior interosseous
branch of median nerve (C8-T1).

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16
Q

Flexor Pollicis

Longus

A 
Origin: Anterior surface of radius and
adjacent interosseous membrane of forearm.
Insertion: Palmar aspect of base of distal
phalanx of thumb.
Action: Flexes thumb.
Innervation: Anterior antebrachial
interosseous nerve (C7
-T1).
17
Q

Pronator

Quadratus

A

Origin: Anterior aspect of distal one quarter of ulna.
Insertion: Anterior aspect of distal one
quarter of radius.
Action: Pronates forearm at radioulnar joints.
Innervation: Anterior antebrachial
interosseous nerve (C7-C8).

18
Q

Abductor

Pollicis Longus

A

Origin: Posterior aspects of proximal half of
ulna and middle one third of radius,
adjacent interosseous membrane of forearm.
Insertion: Lateral aspect of base of first
metacarpal bone.
Action: Abducts and extends thumb at first
carpometacarpal joint.
Innervation: Posterior antebrachial
interosseous nerve (C7-C8).

19
Q

Extensor

Pollicis Brevis

A 
Origin: Posterior surface of distal half of
radius and adjacent interosseous
membrane of forearm.
Insertion: Dorsal aspect of base of proximal
phalanx of thumb.
Action: Extends thumb.
Innervation: Posterior antebrachial
interosseous nerve (C7-C8).
20
Q

Extensor

Pollicis Longus

A 
Origin: Posterior surface of middle one
third of ulna and adjacent interosseous
membrane of forearm.
Insertion: Dorsal aspect of base of distal phalanx of thumb.
Action: Extends thumb.
Innervation: Posterior antebrachial
interosseous nerve (C7-C8).
21
Q

Extensor

Indicis

A

Origin: Posterior surface of distal one third
of ulna and adjacent interosseous
membrane of forearm.
Insertion: Extensor expansion of index finger.
Action: Extends index finger.
Innervation: Posterior antebrachial
interosseous nerve (C7-C8).

Muscle origin and insertions (4 decks)

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