Carpals Flashcards
What kind of bones are the Carpals
Pisiform is Sesamoid
The other 7 are Short
Name the 4 Carpals in the Proximal Row (Lateral to Medial)
Scaphoid
Lunate
Triquetral
Pisiform
Name the 4 Carpals in the Distal Row (Medial to Lateral)
Hamate
Capitate
Trapezoid
Trapezium
What is the Mnemonic I like to use to remember the Carpals
So Long To Pinky (Lat to Med)
Here Comes The Thumb (Med to Lat)
Name the 5 Associated Joints
Ulnomeniscotriquetral Radiocarpal Midcarpal Intercarpal Carpometacarpal
What are the articulating surfaces of the Ulnomeniscotriquetral Jt
Distal Ulna and Triquetral Carpal, sandwiching a meniscus
What are the articulating surfaces of the Radiocarpal Jt
Distal end of Radius with Scaphoid and Lunate
What are the articulating surfaces of the Midcarpal Jts
Between the Proximal and Distal Row of Carpals
What are the articulating surfaces of the Intercarpal Jts
Adjacent surfaces of Carpals (between each carpal)
What are the articulating surfaces of the Carpometacarpal Jts
Distal row of Carpals and Bases of the Metacarpals
Associated Muscle Movements (4)
Wrist Flexors (Flexor Carpi Ulnaris) Wrist Extensors (Tendons pass over) Wrist Deviators (Tendons pass over) Intrinsic Hand Muscles (Palmar Interossei)
Which is the most frequently broken bone in the wrist
Scaphoid
Which wrist bone is most frequently dislocated
Lunate
Characteristics of the Pisiform Bone (4)
Sits anterior to Triquetral (not visible from posterior view)
Only articulates with Triquetral
Acts as a Sesamoid bone for Flexor Carpi Ulnaris
Muscle Attachment (Abductor Digiti Minimi)
Characteristics of Trapezium (3)
Saddle shaped for its articulation with MC #1 (forms saddle joint of thumb) Muscle Attachment (Opponens Pollicis) Tubercle (Ligament Attachment)
Characteristics of Trapezoid
Articulates with MC #2
Characteristics of Capitate (3)
Keystone (middle) of Wrist
Largest Carpal
Articulates with MC #3
Characteristics of Hamate
Articulates with MC #4 and #5
Muscle Attachment (Flexor Carpi Ulnaris)
Hook (Muscle Attachment: Opponens Digiti Minimi)
What do the shape of the Carpal Bones create
A cascade that forms the floor of the Carpal Tunnel
What structure covers the Carpal Tunnel
Flexor Retinaculum
Which bones anchor the Flexor Retinaculum
Medial Anchor: Hook of Hamate and Pisiform
Lateral Anchor: Tubercles of the Scaphoid and Trapezium
Characteristics of Scaphoid (2)
Articulates with the Radius Muscle Attachment (Abductor Pollicis Brevis)
Characteristics of Lunate
Articulates with the Radius
Characteristics of Triquetral/Triquitrum
Articulates with Ulna/Disc
Which Function do ALL Carpals have in common
Ligament Attachment
