Introduction Hand, finger

Total Bones in hand/wrist

27 total bones in each hand/wrist region

How many bones are in the phalanges?

14 in each hand

How many bones are in the metacarpals?

5 in each hand

How many bones are in the carpals?

8 in each wrist

What is the function of the phalanges?

Compose the digits

how are the phalanges numbered?

Numbered 1–5 from lateral to medial

What is the distribution of the phalanges?

• Digits 2 through 5: Contain 3 phalanges each.

• First Digit (Thumb): Contains 2 phalanges.

naming of the phalanges?

Named according to location (e.g., distal phalanx of third digit).

what is the function of the metacarpals?

Compose the palm of the hand.

what is the numbering of the metacarpals?

Identified by numbers, laterally to medially.

what’s the anatomical orientation of the metacarpal bones?

• Heads: Distal; articulate with the phalanges.

• Bases: Proximal; articulate with the carpals.

what do the carpals form?

Form two rows of four carpals each (proximal and distal)

Proximal Row (Lateral to Medial) OF THE CARPALS

• Scaphoid (Alternate names: Navicular, Steve)

• Lunate (Alternate names: Semilunar, Left)

• Triquetrum (Alternate names: Triangular, Cuneiform, Triquetral, The)

• Pisiform (No other name; Party)

Distal Row (Lateral to Medial): OF THE CARPALS

• Trapezium (Alternate names: Greater Multangular, To)

• Trapezoid (Alternate names: Lesser Multangular, Take)

• Capitate (Alternate names: Os Magnum, Carol)

• Hamate (Alternate names: Unciform, Home)

Mnemonic for Carpals (Lateral to Medial, Proximal then Distal)

Steve Left The Party To Take Carol Home

• Scaphoid | Lunate | Triquetrum | Pisiform

• Trapezium | Trapezoid | Capitate | Hamate

Interphalangeal (IP) joint Articulation / Location

Articulations between phalanges (identified by location and digit number)

Interphalangeal (IP) joint Classification / Joint Type

Synovial, diarthrotic (freely movable), hinge type

Metacarpophalangeal (MCP) Articulation / Location

Articulations between heads of metacarpals and proximal phalanges (identified by number 1–5)

Metacarpophalangeal (MCP) Classification / Joint Type

Synovial, diarthrotic, ellipsoidal type

1st Carpometacarpal (CMC) Articulation / Location

Base of the 1st metacarpal and carpal bone

1st Carpometacarpal (CMC) Classification / Joint Type

Synovial, diarthrotic, saddle type

2nd–5th Carpometacarpal (CMC) Articulation / Location

Bases of the 2nd through 5th metacarpals and carpal bones

2nd–5th Carpometacarpal (CMC) Classification / Joint Type

Gliding type

Intercarpal Articulation / Location

Articulations between the carpal bones

Intercarpal Classification / Joint Type

Synovial, diarthrotic, gliding type

Radiocarpal Articulation / Location

Articulation between carpals and distal radius

Radiocarpal Classification / Joint Type

Synovial, diarthrotic, ellipsoidal type

Yellow

IP JOINTS

Blue

MCP Joints

Green

CMC Joints

Red

Radiocarpal joint