What does the capitate do?
Function. The carpal bones function as a unit to provide a bony superstructure for the hand. They allow movements of the wrist from side to side (medial to lateral) as well as up and down (anterior to posterior).
What do you mean by capitate?
1 : forming a head. 2 : abruptly enlarged and globose.
What muscle attaches to capitate?
adductor pollicis
The adductor pollicis is a two-headed muscle lying deep in the web space of the thumb (see Fig. 7.30; see also Fig. 7.28). This muscle has its proximal attachments on the most stable skeletal regions of the hand: The capitate bone and the second and third metacarpals.
How many bones are in the capitate?
The capitate articulates with seven bones: the scaphoid and lunate proximally, the second, third, and fourth metacarpals distally, the trapezoid on the radial side, and the hamate on the ulnar side.
Can you dislocate your capitate?
Dislocation of the capitate is called a perilunate dislocation. Perilunate dislocations are more common than lunate dislocations. These dislocations result from great force that causes the wrist to bend backward, usually a fall on an outstretched hand or an injury in a car crash.
Where is the metacarpus?
hand
In humans the five metacarpals are flat at the back of the hand and bowed on the palmar side; they form a longitudinal arch that accommodates the muscles, tendons, and nerves of the palm. The metacarpals also form a transverse arch that allows the fingertips and thumb to be brought together for manipulation.
What is capitate flower?
In botany, head-shaped, or collected in a head, as a dense terminal cluster of sessile or nearly sessile flowers; having a rounded head: as, a capitate stigma.
What are the carpal bones?
The carpal bones are bones of the wrist that connect the distal aspects of the radial and ulnar bones of the forearm to the bases of the five metacarpal bones of the hand. There are eight carpal bones, which divide into two rows: a proximal row and a distal row.
Can you break your capitate?
FRACTURES OF THE CAPITATE. Fractures of the capitate are rare and account for only 1.3% of all carpal fractures. Most of these fractures occur in association with additional carpal pathology, particularly scaphoid fractures; isolated fractures of the capitate make up only 0.3% of carpal injuries.
How do you fracture a Capitate?
Capitate fractures may result from direct trauma to the dorsal aspect of the wrist or extreme dorsiflexion with radial deviation producing a more complicated fracture-dislocation. The capitate is often associated with transscaphoid, transcapitate, perilunate fracture- dislocation, and scaphocapitate syndrome.
What kind of shape is the capitate head?
The capitate head sits in the space allowed by the lunate and scaphoid bones of the proximal carpal bone row. Proximally, the capitate has rounded surface whilst the distal end has a triangular shape with a palmarly directed apex. The palmar surface is slightly convex with the other surfaces concave being the dorsal,…
Where is the capitate located in the hand?
Where is the Capitate Located It is the third bone from the thumb in the distal carpal row, wedged between the trapezoid (on the radial side) and the hamate (on the ulnar side) bones. The capitate is located right at the center of the human wrist.
How did the capitate bone get its name?
Due to this shape, it gets its name from the Latin word ‘caput’, meaning ‘head’ [5]. It is the third bone from the thumb in the distal carpal row, wedged between the trapezoid (on the radial side) and the hamate (on the ulnar side) bones [1].
What is the palmar surface of a capitate?
The capitate head sits in the space allowed by the lunate and scaphoid bones of the proximal carpal bone row. Proximally, the capitate has a rounded surface whilst the distal end has a triangular shape with a palmarly directed apex. The palmar surface is slightly convex with the other surfaces concave being the dorsal, ulnar and radial surfaces.