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PECTORAL REGIONSAKINA

Anatomy and Histology Dept.Fac. of Medicine UNAIR

sakinahusen@yahoo.com

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PECTORAL REGION

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SURFACE ANATOMY:• ANTERIOR: Pectoralis major m.(male) & mammary gland (female)

• POSTERIOR: Scapula

• FASCIA:• SUPERFICIAL: Fat >>, vessels&nerves (cephalic v.), mammary gland

• DEEP: continue to abdominal region

• Pectoral fascia: clavicle to sternum, encloses pectoralis major m., continue dorsi form axillary fascia

• Axillary fascia: as the base of axillary fossa, form suspensory lig.of axillafascia, continue to brachial fascia

• Clavipectoral fascia: encloses pectoralis minor m.&subclavius m.,

Costocoracoid membrane: pierces by cephalic vein, thoracoacromial a., lan.

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Mammary gland

• Extends from 2nd-6th ribs, Lateral

sternum to midaxillary line• Supported by suspensory lig.(cooper’s), retromammary space

• Modified sweat glands, consists oflobulesducts&sinusnipple

• Vascular supply: axillary artery,internal thoracic, intercostals aa.

• Innervation: intercostals nn.

• Venous drainage: follow its arteries

• Lymphatic drainage: mostly to Axillarynodes

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Anterior Pectoral region

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Muscles:• Truncocingular:

pectoralis minor

• Truncoextremital:pectoralis majorsternocostal part

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Cinguloextremital:pectoralis majorclavicular part

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Posterior pectoral region

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Muscles:• Extrinsic superficial: Trapezius & latissimus dorsi

• Extrinsic profundus: levator scapulae, rhomboidei minor et major

• Intrinsic: mm. deltoideus, supraspinatus, infraspinatus, subscapulaminor et major.

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