Carpals

Question 1

How many carpals are there

Answer 1

Eight

Question 2

Describe the scaphoid

Answer 2

Shaped like a boat, with a major concave surface that articulated with the capitate, one of the largest carpal bones, lost lateral and proximal carpal (Under thumb)

Question 3

How would you side the scaphoid anatomically and positionally

Answer 3

Anatomically: The concave surface is distal and the tubercle is lateral. Positionally: Hold the concave facet towards you and the tubercle up, the tubercle learns towards the side from which the bone comes

Question 4

Describe the Lunate

Answer 4

Shaped like the crescent moon. The deeply concave surface articulates with the capitate, bottom bone

Question 5

Describe the Triquetral

Answer 5

This is the third bone from the thumb side in the proximal row. It has three main articular surfaces

Question 5

How would you side the lunate anatomically and positionally

Answer 5

Anatomically: The facet is distal
Positionally: place the flat side on the table and the most concave facet towards you the remaining facet rises up and towards the side from which the bone comes

Question 6

How would you side the triquetral anatomically and positionally

Answer 6

Anatomically: The smallest of the three major articular surfaces is for the pisiform, the largest is for the hamate and is distal
Positionally: Hold the common edge between the two largest facets towards yo. When the third facet is up the facet points to the side it’s from

Question 7

Describe the Pisiform

Answer 7

Pea shaped bone, with one side flattened, this is the smallest carpal

Question 8

How would you side the pisiform anatomically and positionally

Answer 8

Anatomically: The non-articular body underlies the ulnar
Positionally: Hold the facet towards you, turn the bone until the bulk of the non articular surface is up. The groove faces the side in which it comes

Question 9

Describe the Trapezium

Answer 9

Irregularly sided bone, largest facet is saddle shaped and has a long narrow tubercle

Question 10

How would you side the trapezium anatomically and positionally

Answer 10

Anatomically: The groove adjacent to the tubercle is medial
Positionally: place the bone on a flat surface with the tubercle on top and away from you. The groove adjacent to the tubercle is on the side from which the bone comes

Question 11

Describe the Trapezoid

Answer 11

This is boot shaped, it is the smallest carpal in the distal row

Question 12

How would you side the trapezoid anatomically and positionally

Answer 12

Anatomically: The largest non articular surface is dorsal and it’s most pointed corner is lateral
Positionally: Place the sole of the boot on a flat surface with the v shape towards you, the toe of the boot faces towards it’s side

Question 13

Describe the Capitate

Answer 13

This is a large carpal bone, distal end is squared off and the proximal end is rounded

Question 14

How would you side the Capitate anatomically and positionally

Answer 14

Anatomically: The head of the bone faces downwards and articulates with the lunate and scaphoid
Positionally: When the head is up and the base is on the table, place the narrow articulation that runs up the side of the bone towards you. This articulation is on the side on which the bones comes from

Question 15

Describe the Hamate

Answer 15

This is hook shaped, small projection is called the hamulus

Question 16

How would you side the hamate anatomically and positionally

Answer 16

Anatomically: The side with a double facet is distal
Positionally: Place the flat surface down with the hook and two facets facing away, the hook leans towards the side which it comes from

Question 17

Where are the carpals found

Answer 17

In the wrist or hand

Question 18

Name all the carpals

Answer 18

Scaphoid, Lunate, Triquetral, Pisiform, Trapezium, Trapezoid, Capitate and Hamate