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U2 Topic 3
| Question | Answer |
|---|---|
| Carpals | 8 small wrist bones joined to each other by ligaments and lined up in two rows; named based on their shapes. Examples: Scaphoid, lunate, triquetrum, pisiform, trapezium, trapezoid, capitate, hamate |
| Proximal row of carpals | Scaphoid, lunate, triquetrum, pisiform (thumb side to pinky side) |
| Distal row of carpals | Trapezium, trapezoid, capitate, hamate (thumb side to pinky side) |
| Scaphoid | Boat-shaped carpal on the thumb side of the proximal row; articulates with the radius |
| Lunate | Moon-shaped carpal in the middle of the proximal row; articulates with the radius |
| Triquetrum | Triangular carpal on the pinky side of the proximal row |
| Pisiform | Small pea-shaped carpal that sits on top of the triquetrum |
| Trapezium | Carpal on the thumb side of the distal row; articulates with the 1st metacarpal (thumb) |
| Trapezoid | Small carpal next to the trapezium in the distal row; articulates with the 2nd metacarpal |
| Capitate | Largest carpal, in the middle of the distal row; articulates with the 3rd metacarpal |
| Hamate | Hook-shaped carpal on the pinky side of the distal row; articulates with the 4th and 5th metacarpals |
| Metacarpals | 5 bones of the palm, numbered 1-5 from the thumb (1st) to the pinky (5th) |
| Phalanges of the hand | 14 finger bones; each finger has a proximal, intermediate, and distal phalanx, and the thumb has only proximal and distal |
| Proximal phalanges | Finger or toe bones closest to the palm or foot |
| Intermediate phalanges | Middle finger or toe bones; the thumb and big toe don't have one |
| Distal phalanges | Finger or toe bones at the tips |
| Tarsals | 7 bones that form the ankle joint and part of the foot. Examples: Calcaneus, talus, navicular, cuboid, medial cuneiform, intermediate cuneiform, lateral cuneiform |
| Calcaneus | Heel bone; largest tarsal |
| Talus | Ankle bone; articulates with the tibia and fibula |
| Navicular | Boat-shaped tarsal on the medial side of the foot, in front of the talus |
| Cuboid | Cube-shaped tarsal on the lateral side of the foot, in front of the calcaneus |
| Medial cuneiform | Wedge-shaped tarsal that articulates with the 1st metatarsal (big toe) |
| Intermediate cuneiform | Wedge-shaped tarsal that articulates with the 2nd metatarsal |
| Lateral cuneiform | Wedge-shaped tarsal that articulates with the 3rd metatarsal |
| Metatarsals | 5 foot bones, numbered 1-5 from the big toe (1st) to the little toe (5th); with the phalanges they make up the forefoot |
| Phalanges of the foot | 14 toe bones; each toe has a proximal, middle, and distal phalanx, and the big toe has only proximal and distal |