Yapa Wijeratne
Faculty of Medicine
University of Peradeniya
 Fascia: masses of connective tissue large
enough to be visible to the unaided eye.
 The skin is connected to the underlying bones or deep
fascia by a layer of loose areolar connective tissue.
 This layer...
 Flat sheets of muscles are also present in
some regions. These include
 Skeletal muscles
 Platysma
 Palmaris brevis
...
 The superficial fascia is most distinct on the
lower abdominal wall where it differentiates into
two layers.
 Well differentiated in
1. limbs
2. perineum
 Thin
1. Dorsal aspects of the hands and feet,
2. the sides of the neck and...
 Strong connective tissue bands traverse the
superficial fascia binding the skin to the
underlying aponeurosis of the sca...
 The limbs and body wall are wrapped in a membrane
of fibrous tissue, the deep fascia.
 It varies widely in thickness.
...
 Where deep fascia passes directly over bone it is
always anchored firmly to the periosteum.
 In the neck, as well as th...
 Deep fascia is very sensitive.
 Its nerve supply, and that of subcutaneous
periosteum, is that of the overlying skin.
...
Superficial & deep fascia
Superficial & deep fascia
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Superficial & deep fascia

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Superficial & deep fascia

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Superficial & deep fascia

  1. 1. Yapa Wijeratne Faculty of Medicine University of Peradeniya
  2. 2.  Fascia: masses of connective tissue large enough to be visible to the unaided eye.
  3. 3.  The skin is connected to the underlying bones or deep fascia by a layer of loose areolar connective tissue.  This layer, usually referred to as superficial fascia, is of variable 1. Thickness 2. Fat content 3. Flat sheets of muscles- in some regions.  The quantity and distribution of subcutaneous fat differs o in the sexes-more in females. o with climate (rather than race)-more in colder geographical regions.
  4. 4.  Flat sheets of muscles are also present in some regions. These include  Skeletal muscles  Platysma  Palmaris brevis  Smooth muscles  Subareolar muscle of the nipple  Dartos  Corrugator cutis ani
  5. 5.  The superficial fascia is most distinct on the lower abdominal wall where it differentiates into two layers.
  6. 6.  Well differentiated in 1. limbs 2. perineum  Thin 1. Dorsal aspects of the hands and feet, 2. the sides of the neck and face, 3. around the anus 4. over the penis and scrotum  Almost absent  external ears.
  7. 7.  Strong connective tissue bands traverse the superficial fascia binding the skin to the underlying aponeurosis of the scalp, palm and sole.  Typical superficial fascia is lacking in the palms and soles, where numerous strong connective tissue collagenous bands tether the dermis of the skin to underlying structures.  Also atypical is the skin of the scalp, where dense dermal connective tissue and the epicranial aponeurosis are bound together as a layer that ‘rides’ on loose connective tissue overlying the periosteum of the skull.
  8. 8.  The limbs and body wall are wrapped in a membrane of fibrous tissue, the deep fascia.  It varies widely in thickness.  Very well developed:  iliotibial tract of the fascia lata  So thin/Scarcely demonstrable (usually considered to be absent):  Over the rectus sheath  External oblique aponeurosis of the abdominal wall  Entirely absent:  Face,  Ischioanal fossa
  9. 9.  Where deep fascia passes directly over bone it is always anchored firmly to the periosteum.  In the neck, as well as the investing layer of deep fascia, there are other deeper fascial layers enclosing neurovascular structures, glands and muscles.  Intermuscular septa are laminae of deep fascia which extend between muscle groups and frequently become continuous with the periosteum of bones.  Transverse thickenings of deep fascia over tendons, attached at their margins to bones, form retinaculae at the wrists and ankles and fibrous sheaths on the fingers and toes.
  10. 10.  Deep fascia is very sensitive.  Its nerve supply, and that of subcutaneous periosteum, is that of the overlying skin.  The nerves to muscles supply the intermuscular septa and deep periosteum.
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