Metacarpals

Question 1

What type of Bone are the Metacarpals

Answer 1

Long Bones

Question 2

Name the 3 Associated Joints

Answer 2

Carpometacarpal (CMC)
Intermetacarpal
Metacarpophalangeal (MCP)

Question 3

What are the articulating surfaces of the Carpometacarpal Jts

Answer 3

Distal surfaces of distal row of carpals with bases of metacarpals

Question 4

What are the articulating surfaces of the Intermetacarpal Jts

Answer 4

Adjacent surfaces of bases of MC’s #2-#5

Question 5

What are the articulating surfaces of the Metacarpophalangeal Jts

Answer 5

Between the MC heads and the bases of the corresponding proximal phalanges

Question 6

Associated Muscle Actions (3)

Answer 6

Thumb Abductors/Adductors/Opposition (Adductor Pollicis)
Finger/Wrist Flexors and Extensors (Extensor Carpi Ulnaris)
Intrinsic Hand Muscles (Lumbricals Manus)

Question 7

Special characteristics

Answer 7

Shafts are slightly curved to create the concavity of the palm

Question 8

Which MC is the shortest and thickest

Answer 8

1st

Question 9

What’s special about MC #2

Answer 9

Longest

Question 10

What’s special about MC #1

Answer 10

Its head has two sesamoid bones (lateral and medial side) for Oblique Head of Adductor Pollicis

Question 11

What portion are considered knuckles

Answer 11

Heads

Question 12

What are the 3 Landmarks

Answer 12

Head
Body/Shaft
Base

Question 13

Function of MC Head (3)

Answer 13

Joint surface (MCP)
Lig. Attachment
Muscle Attachment

Question 14

Function of MC Body/Shaft

Answer 14

Muscle Attachment

Question 15

Function of MC Base (3)

Answer 15

Joint Surface (CMC)
Muscle Attachment
Ligament Attachment