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Department of Neurobiology and Developmental Sciences: Human Structure Module
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  9. Fasciae of the Upper Limb

Fasciae of the Upper Limb

StructureLocation/DescriptionNotes
bicipital aponeurosisan extension of the tendon of the biceps brachii m. what blends with the
antebrachial fascia on the medial side of the antecubital fossa
bicipital aponeurosis is an important structure to phlebotomists because
it is superficial to the brachial artery and median nerve, but deep to the
superficial veins of the upper limb - this provides some protection for the
deeper structures during venipuncture
costocoracoid membranedeep fascia extending from the clavicle to the superior border of the pectoralis
minor m.
costocoracoid membrane is named for its medial (ribs) and lateral (coracoid
process of the scapula) attachments; it is penetrated by three structures:
cephalic v., thoracoacromial a. and lateral pectoral n.
extensor retinaculuma thickening of the deep fascia on the dorsum of the wristextensor retinaculum is attached to the bones of the dorsum of the wrist
in several locations, resulting in compartments which separate and anchor the
extensor tendons; tendons are surrounded by synovial tendon sheathes where
they pass deep to retinacula
fascia, antebrachialdeep fascia which forms a tubular investment of the forearm musclesantebrachial fascia is attached to the radius via the lateral intermuscular
septum; it is attached to the subcutaneous border of the ulna
fascia, axillarydeep fascia which forms the floor of the axilla inferiorlyaxillary fascia is attached to the suspensory ligament of the axilla; it
is continuous with the pectoral fascia
fascia, brachialdeep fascia which forms a tubular investment of the armbrachial fascia is attached to the humerus via medial and lateral intermuscular
septae
fascia, clavipectorala layer of deep fascia attaching to the clavicle superiorly and the axillary
fascia inferiorly
clavipectoral fascia has several named subdivisions: it surrounds the subclavius
m. and is thickened inferior to the muscle where it is called the costocoracoid
ligament; clavipectoral fascia extends inferiorly to the from the costocoracoid
membrane to the pectoralis minor m., a part which is called the costocoracoid
membrane (pierced by cephalic v., lateral pectoral n., thoracoacromial a.);
it encloses the pectoralis minor m. then continues inferolaterally to attach
to the axillary fascia, a part which is called the suspensory ligament of the
axilla
fascia, hypothenarfascia covering the hypothenar muscle grouphypothenar fascia blends with the palmar aponeurosis and attaches to the
fifth metacarpal bone; it defines the hypothenar compartment of the hand
fascia, thenarfascia covering the thenar muscle groupthenar fascia blends with the palmar aponeurosis and attaches to the first
metacarpal bone it defines the thenar compartment of the hand
flexor retinaculuma thickening of the deep fascia on the ventral surface of the wristflexor retinaculum spans the ventral surfaces of the carpal bones (medially
- scaphoid and trapezium; laterally - hamate and pisiform) to complete an osseofibrous
tunnel for passage of the flexor tendons; tendons are surrounded by synovial
tendon sheathes where they pass deep to retinacula
palmar aponeurosisa thickening of the deep fascia covering the palm of the handpalmar aponeurosis is composed of very dense connective tissue that extends
out into each of the fingers
palmar carpal ligamenta thickening of the antebrachial fascia on the ventral surface of the wristpalmar carpal ligament is a retinaculum that supports the tendons of the
superficial flexor mm.; it is superficial and proximal to the flexor retinaculum
of the wrist
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