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Anatomy 2 - Written Exam > Intrinsic Muscles of the Hand - Central Compartment > Flashcards

Intrinsic Muscles of the Hand - Central Compartment Flashcards

1
Q

What are the attachments of adductor pollicis?

A

O: oblique head - bases of 2nd, 3rd and 4th metacarpals, trapezoid and capitate
Transverse head - anterior surface of shaft of 3rd metacarpal

I: medial side of base of proximal phalanx

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2
Q

What are the attachments of the 1st palmar interosseous muscle?

A

O: shaft of 1st metacarpal

I: via DDE of extensor pollucis longus into medial side of base of proximal phalanx - with adductor pollicis

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3
Q

what is the DOF of adductor pollicis?

A

oblique head - inferolaterally

transverse head - horizontally

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4
Q

what is the DOF of the 1st palmar interosseous?

A

inferiorly

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5
Q

what is the nerve supply to adductor pollicis?

A

deep branch of the ulnar nerve - C8, T1

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6
Q

what is the nerve supply to the 1st palmar interosseous muscle?

A

deep branch of the ulnar nerve - C8, T1

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7
Q

what is the action of the adductor pollicis muscle?

A

adduction of the 1st CMC joint

late stage opposition

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8
Q

what is the action of the 1st palmar interosseous muscle?

A

adduction of the 1st CMC joint

Assists flexion of 1st MCP

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9
Q

what are the attachments of the dorsal interossei?

A

O: bipennate - originate on adjecent on the sides of adjacent metacarpals

I: DDE and proximal phalanx of the appropriate finger

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10
Q

what is the function of the dorsal interossei?

A

abduct the index, middle and ring fingers

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11
Q

Nerve supply of the dorsal interossei

A

ulnar nerve T1

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12
Q

Shape and DOF of dorsal interossei

A

bipennate muscle - inferiorly

pass posteriorly to the deep transverse metacarpal ligament

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13
Q

Attachments of the palmar interossei

A

O: 1st and 2nd originate on medial side of respective metacarpals

3rd and 4th originate on lateral side of ring and little finger respectively

I: DDE and base of proximal phalanx of the same digit

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14
Q

Action of the palmar interossei

A

adduct all digits except the middle finger

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15
Q

what is the nerve supply of the palmar interossei

A

ulnar nerve T1

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16
Q

DOF of the palmar interossei

A

inferiorly

17
Q

What are the attachments of the lumbraicals?

A

O: lateral dies of the flexor digitorum profundus tendons

I: lateral edge of DDE of same finger

18
Q

Action of the lumbricals

A

flex the MCP joint, extend the DIP and PIP joint of all fingers (duck)

19
Q

what is the nerve supply of the lumbricals

A

lateral two - median nerve T1

medial two - ulnar nerve T1

20
Q

what is the shape and DOF of the lumbricals

A

lateral 2 are unipennate

middle two are bipennate

Anatomy 2 - Written Exam (22 decks)

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