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Pectoral fascia Superficial muscles of the chest and front of the arm. Latin fascia pectoralis Gray's subject #122 435 The pectoral fascia is a thin lamina, covering the surface of the Pectoralis major, and sending numerous prolongations between its fasciculi: it is attached, in the middle line, to the front of the sternum; above, to the clavicle; laterally and below it is continuous with the fascia of the shoulder, axilla, and thorax. It is very thin over the upper part of the Pectoralis major, but thicker in the interval between it and the Latissimus dorsi, where it closes in the axillary space and forms the axillary fascia; it divides at the lateral margin of the Latissimus dorsi into two layers, one of which passes in front of, and the other behind it; these proceed as far as the spinous processes of the thoracic vertebræ, to which they are attached. As the fascia leaves the lower edge of the Pectoralis major to cross the floor of the axilla it sends a layer upward under cover of the muscle; this lamina splits to envelop the Pectoralis minor, at the upper edge of which it is continuous with the coracoclavicular fascia. The hollow of the armpit, seen when the arm is abducted, is produced mainly by the traction of this fascia on the axillary floor, and hence the lamina is sometimes named the suspensory ligament of the axilla. At the lower part of the thoracic region the deep fascia is well-developed, and is continuous with the fibrous sheaths of the Recti abdominis. External links Pectoral+fascia at eMedicine Dictionary SUNY Labs 04:05-0100 - "Pectoral Region: Reflect Pectoralis Major Muscle" This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated. v • d • e List of muscles of thorax and back (TA A04.3-4, GA 4.397) Back splenius (capitis, cervicis) · erector spinae (iliocostalis, longissimus, spinalis) · latissimus dorsi transversospinales: (semispinalis dorsi, semispinalis cervicis, semispinalis capitis, multifidus, rotatores) · interspinales · intertransversarii Vertebral column: trapezius · latissimus dorsi · rhomboid (major, minor) · levator scapulae fascia: Thoracolumbar fascia Thorax intercostales (external, internal, innermost) · subcostales · transversus thoracis · levatores costarum · serratus posterior (inferior, superior) · diaphragm Thoracic cavity: pectoralis major · pectoralis minor · subclavius · serratus anterior fascia: Pectoral fascia · Clavipectoral fascia M: MUS, DF+DRCT anat (h/n, u, t/d, a/p, l)/phys/hist noco(m, s, c)/cong(d)/tumr, sysi/epon, injr proc, drug (M1A/3) This article has not been added to any categories. Please help out by adding categories to it so that it can be listed with similar articles. (September 2010) This anatomy article is a stub. You can help Wikipedia by expanding it. v • d • e