Carpal Bone Siding

Proximally the scaphoid and lunate articulate with the radius to form the wrist joint also known as the radio carpal joint.

Carpal bone siding.

Each carpal except the pisiform in some cases can be sided unambiguously by identifying the facets for other carpals and applying your knowledge of the anatomical relationships between the carpal bones. A membranous band the flexor retinaculum spans between the medial and lateral edges of the arch forming the carpal tunnel. Make a fist with your thumb in. On the palmar side the carpus is concave and forms the carpal tunnel which is covered by the flexor retinaculum.

Repeat this for five to 10 times. When considered as paired rows each row forms an arch which is convex proximally and concave distally. Articulations between the carpal bones in hand are an. This quiz has tags.

Make a tight fist and open all your fingers fanning them as wide as possible. Click on the tags below to find other quizzes on the same subject. It articulates distally via a double facet with the base of mc 2. This has four articular surfaces and two nonarticular surfaces.

Those between the radius and the proximal carpal bones except pisiform 8. Palmar surface flexor carpi ulnaris abductor. All the joints involving the carpal bones are synovial joints where the articulation surface has a flexible cartilage layer along with a fluid lining to allow for better freedom of movement 22. Smallest carpal bone last to ossify sits at a plane anterior to the other carpal bones medial to guyon s canal 2.

A carpal boss which is short for carpometacarpal boss is an overgrowth of bone where your index or middle finger meets the carpal bones. Sometimes called the lesser multangular is boot shaped and is the smallest carpal bone in the distal row. Hold for five to 10 seconds 3. Dorsal surface triquetrum 3.

There is a printable worksheet available for download here so you can take the quiz with pen and paper. Touch the tip of your index finger and thumb making an o. This is an online quiz called carpal bones. The eight carpal bones may be conceptually organized as either two transverse rows or three longitudinal columns.

Collectively the carpal bones form an arch in the coronal plane. Posts about siding carpals written by jb. In the distal row all of the carpal bones articulate with the. Even so because of the complex articulations of these bones positional siding tricks can be especially useful for carpals.