Human Anatomy Vol 1

UPPER LIMB

For subcoracoid oenire:

Appearance-1Oth year

Fusion-16th to

1 Bth year (2)

Fig.2,12t Winging of right scapula

Feoiures

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1 The head is directed medially, backwards and

upwards. It articulates with the glenoid cavity of the

scapula to form the shoulder joint. The head forms

about one-third of a sphere and is much larger than

the glenoid cavity.

2 The line separating the head from the rest of the

upper end is called t}:re anatomical neck.

3 The lesser tubercle (Latin lump) is an elevation on the

anterior aspect of the upper end (Fig. 2.13).

4 The greater tubercle is an elevation that forms the

lateral part of the upper end. Its posterior aspect is

marked by three impressions-upper, middle and

lower.

5 The intertubercular sulcus orbicipital groove separates

the lesser tubercle medially from the anterior part of

the greater tubercle. The sulcus has medial and lateral

Capitulum

Fi1,2.13: General features of right humerus seen from front

lips that represent downward prolongations of the

lesser and greater tubercles.

6 The narrow line separating the uPper end of the

humerus from the shaft is called the surgicnl neck

(Fig.2.1a).

7 Morphological neck lies 0.5 cm above surgical neck;

shows the position of epiphyseal line (Fig.2.1q.

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The shaft is rounded in the uPPer half and triangular

in the lower half. It has three borders and three surfaces.

For coracoid process:

Appearance-lst year

Fusion-15th year (1)

Greater tubercle

Anatomical neck

Medial lip

Lateral lip

Deltoid tuberosity

Anterior border

Anterolateral surface

Lateral supra-

condylar ridge

Radial fossa

Lateral epicondyle

Hole in capsule

Lesser tubercle

Head

Capsular line

lntertubercular sulcus

Medial border

Nutrient foramen

Anteromedial surface

Coronoid fossa

Medial supracondylar

ridge

Medial epicondyle

Trochlea and its medial

edge

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F19.2.11: Ossification of scapula