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Lecture 7

PNB 2264 Lecture Notes - Lecture 7: Necrosis, Ischium, Metacarpal Bones

Physiology and Neurobiology
Course Code
PNB 2264

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Notes Day 7
Skeleton: continues
Appendicular Skeleton
- All the bones not in the axial skeleton
- Upper and lower limbs
- Attachment to axial skeleton
- Inherently less strong, but also much more movement
Pectoral girdle
- Shoulder
- Attachment of upper limbs to axial skeleton
- Scapula and clavicle
- Scapula makes no physical connection to ribs, soft tissue and muscles in between them
- The clavicle connects the clavicle to the sternum, only connection between appendicular
skeleton and sternum
- Large bone, many processes
- Articulation with humerus
o Glenoid fossa cavity
- Glenoid fossa is shallow
- Less of the humerus head inside fossa
o Inherently less strong
- Connective tissue increases the depth of the fossa
- Trade-off between strength and movement
- Long, S-shaped
- Easily felt through skin
- Direct connection between axial skeleton and upper arm (only connection between
Upper limbs
- Upper, lower arms, wrist and hands
- Upper arm articulates to pectoral girdle, indirectly to axial skeleton
- Humerus to glenoid fossa
- Widens at distal end
- Articulates with radius bone
- Forms elbow
Lower arm
- Radius and ulna bones
- Ulna (medial) opposite thumb
- Radius (lateral) thumb side
- Ulna forms elbow with humerus
- Distal radius articulates with wrist bones
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