10/10 Hand - Brauer (Completed) Flashcards
What does the palmar longus m. Insert into?
Palmar aponeurosis
What is Dupuytren’s Contracture? 5
Thickening of fibrous tissue underneath skin of palm
Correlated w/ alcohol, aging, diabetes
How is opposition of the hand performed? 7
Touching the thumb to the pinkie finger
Which tendons are covered by synovial sheaths within the hand?
Flexor digitorum superficialis m.
Flexor digitorum profundus m.
What is the 5th digital synovial sheath of the hand continuous with? 8
The Ulnar bursa
What are the intrinsic muscles of the hand? 9
Hey There Lady Palms Down
Hypothenar muscles Thenar muscles Lumbrical muscles Palmar interosseous muscles Dorsal interosseous muscles
When discussing the hand where is the midline? 9
Middle finger
Where does the Abductor pollicis brevis m. originate from and insert into? What innervates it? What is its action? 10
Thenar group
Origin:
Flexor retinaculum
Scaphoid tubercle
Trapezium tubercle
I —> proximal phalanx of thumb
N —> recurrent branch of median n.
Action:
Abducts thumb
Aids in opposition (thumb to pinkie)
Where does the Opponens pollicis m. originate from and insert into? What innervates it? What is its action?
Thenar group
Origin:
Flexor retinaculum
I —> 1st metacarpal
N —> recurrent branch of median n.
Action:
Oppose thumb
Rotate medially
Where does the Flexor pollicis brevis superficial head m. originate from and insert into? What innervates it? What is its action?
Origin:
Flexor retinaculum
Tubercle of trapezium
I —> proximal phalanx of thumb (lat. side of the base)
N —> recurrent branch of median n.
A —> flexes thumb
Where does the Flexor pollicis brevis deep head m. originate from and insert into? What innervates it? What is its action?
Thenar group
Origin:
Trapezoid
Capitate
I —>proximal phalanx of thumb (lateral side)
N —> deep branch of ulnar n.
A —>flexes thumb
Where does the adductor pollicis oblique head m. originate from and insert into? What innervates it? What is its action?
Origin:
Capitate
2nd metacarpal
3rd metacarpal
I —> proximal phalanx of thumb
N —> deep ulnar n.
A —> adducts thumb
Where does the Adductor pollicis transverse head m. originate from and insert into? What innervates it? What is its action?
Origin:
Palmar ridge of 3rd metacarpal
I —> tendon of oblique head
N —> deep ulnar n.
A —> adducts thumb
Where does the Abductor digiti minimi m. originate from and insert into? What innervates it? What is its action?
Hypothenar group
O —> pisiform
I —> proximal phalanx of 5th digit
N —> ulnar n.
Action:
Abducts fifth digit
Assists flexion
Where does the Flexor digiti minimi brevis m. originate from and insert into? What innervates it? What is its action?
Hypothenar group
Origin:
Hook of hamate
Flexor retinaculum
I —> proximal phalanx of 5th digit
N —> ulnar n.
A —> flexes proximal phalanx of 5th digit
Where does the Opponens digiti minimi m. originate from and insert into? What innervates it? What is its action?
Hypothenar group
Origin:
Hook of hamate
Flexor retinaculum
I —> medial 5th metacarpal
N —> ulnar n.
A —> brings opposition to thumb
Where does the Lumbricals m. originate from and insert into? What innervates it? What is its action? 14
Deep Intrinsic group
O —> flexor digitorum profundus m.
I —> side of extensor hood
Nerve:
1 and 2 —> median n.
3 and 4 —> deep branch of ulnar n.
Actions:
Flexes MCP joint
Extends PIP joint
Extends DIP joint
Where does the Palmar interosseous m. originate from and insert into? What innervates it? What is its action? 17
Deep Intrinsic muscles
O —> 2, 4, 5th metacarpals (palmar surface)
I —> proximal phalanges
N —> Deep ulnar n.
A —> pAD
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Where does the Dorsal interosseous m. originate from and insert into? What innervates it? What is its action?
Deep Intrinsic group
O —> adjacent side of two metacarpals
I —> proximal phalanges
N —> deep ulnar n.
A —> dAB (extensor hood expansion)
On the palmar hand, how does the radial a. Branch? 18
Radial a. descends along the radius on the poster side
At the head of the radius the radial a. Gives off a superficial palmar branch of the radial a.
The radial a. Crosses over the top of the proximal phalanx where it branches into:
Deep palmar arch a.
Princeps pollicis a. —> radialis indicis a.
On the palmar hand, how does the Ulnar a. Branch? 18
Ulnar a. Feeds into the superficial palmar arch a. At the wrist (just as the radial a. Does)
Once the radial a. And the ulnar a. Feed into the superficial palmar arch what happens next? 18
Superficial palmar arch a. Feeds into the common palmar digital a. Which terminally feeds into the proper palmar digital arteries
What is the superficial palmer arch? 19
add
What is the deep palmar arch? 20
add
What forms the dorsal carpal arch? 21
the radial artery joins with the anterior interosseous artery
What innervates the 4th and fifth digit dorsal side?
ulnar n.
What innervates most o fthe thumb, 2nd, and 3rd digit dorsal side?
radial n.
What innervates most of the palmar hand? 22
median n.
In general, what innervates the thenar eminence?
recurrent branch of median n.
In general, what innervates the hypothenar eminence?
deep branch of ulnar n.
What type of innervation is found on the dorsum of the hand? 25
sensory only
In terms of general musculature what is missing from the dorsum of the hand? 25
There are no intrinsic muscles
