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.
Pectoral fascia
Superficial muscles of the chest and front of the arm.
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 vertebrae, 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 rectus abdominis.
References
This article incorporates text in the public domain from page 435 of the 20th edition ofGray's Anatomy(1918)
External links
Anatomy photo:04:05-0100 at the SUNY Downstate Medical Center - "Pectoral Region: Reflect Pectoralis Major Muscle"
pectoral, fascia, pectoral, fascia, thin, lamina, covering, surface, pectoralis, major, sending, numerous, prolongations, between, fasciculi, attached, middle, line, front, sternum, above, clavicle, laterally, below, continuous, with, fascia, shoulder, axilla,. 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 Pectoral fasciaSuperficial muscles of the chest and front of the arm DetailsIdentifiersLatinfascia pectoralisTA98A04 4 01 017TA22317FMA37803Anatomical terminology edit on Wikidata 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 vertebrae 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 rectus abdominis References Edit This article incorporates text in the public domain from page 435 of the 20th edition of Gray s Anatomy 1918 External links EditAnatomy photo 04 05 0100 at the SUNY Downstate Medical Center Pectoral Region Reflect Pectoralis Major Muscle Portal Anatomy Retrieved from https en wikipedia org w index php title Pectoral fascia amp oldid 1027325104, wikipedia, wiki, book, books, library,
