Chs 6 & 7: Axial & Appendicular Skeleton

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Presentation transcript:

Chs 6 & 7: Axial & Appendicular Skeleton 206 bones in skeletal system Goal: identify bones and their prominent surface features 1

Axial vs. Appendicular Skull Vertebral column Thoracic cage Remaining 126 bones of Pectoral girdle Pelvic girdle Attached limbs

SKULL Cranium vs. facial bones Sutures: Lambdoidal Sagittal Coronal Special case: hyoid bone Sutures: Lambdoidal Sagittal Coronal Squamosal 2

Vertebral Column and Spinal Curvatures Alternating concave and convex curves Abnormal curvatures Kyphosis Lordosis Scoliosis 2

Spinal Deformities

Vertebrae breakfast, lunch & dinner times Typical vertebra has 7 processes (function?) Atlas & Axis (special joint!) Intervertebral discs (anulus fibrosus + nucleus pulposus)

Thoracic Cage Sternum 12 pairs of ribs True vs. false ribs Vertebrosternal, vertebrochondral, vertebral Cracked ribs (composition of rib bone? displaced fractures uncommon, why?)

Appendicular Division Girdles with their associated extremities Pectoral girdle: clavicle and scapula Upper limb: humerus, ulna, radius, carpal bones, hand Pelvic girdle: Os coxae Lower limb: femur, patella, tibia, fibula, tarsal bones, foot

8 carpal (or wrist) bones: From lateral to medial, first proximal then distal Sally Lowers Tim’s Pants, Then Things Can Happen Scaphoid (Navicular) Lunate Triquetrum Pisiform Trapezium Trapezoid Capitate Hamate 8

The Hand Metacarpals: bones in palm of hand Numbered from lateral to medial 14 Phalanges Numbering same as with metacarpals, additionally: proximal, middle and distal phalanx Pollex has only two phalanges

Appendicular Skeleton: Highlights cont. Two os coxae are made up of 3 fused bones each ileum ischium pubis Compare Male and female pelvis True and false pelvis 3

Femur: surgical vs. anatomic neck (also know major bone markings) Patella: large sesamoid bone (patellar ligament) Tibia: medial; fibula: lateral, not weight bearing The real ankle bones are the malleoli

7 tarsal (or “ankle”) bones: Posterior third of foot From lateral to medial, first proximal then distal Cute Tina Never Could Cooperate Calcaneus Talus Navicular Cuboid 3 Cuneiforms (lateral, intermediate, medial) 8

Foot Naming and numbering of metatarsals and phalanges analogous to hand Hallux has only two phalanges

The End 23