What does aponeuroses mean?
Aponeuroses are flat, sheet-like structures made of dense white fibrous connective tissue that serve as broad attachments between muscles and the bones or other muscles they move. Functioning like tendons that have been stretched into wide membranes rather than narrow cords, they distribute muscular force across large areas — most famously in the anterior abdominal wall, the palm (the palmar aponeurosis), and the sole of the foot (the plantar aponeurosis). The word is the plural of aponeurosis and appears almost entirely in anatomy textbooks, surgical literature, and clinical discussion, so it carries a distinctly technical register; lay readers encounter it mainly when reading about conditions such as Dupuytren's contracture or plantar fasciitis. Derived from Greek roots meaning 'away from' and 'sinew,' the term reflects early anatomists' recognition of these sheets as sinew-like expansions. Understanding aponeuroses helps clarify how the body converts concentrated muscle contraction into widespread, controlled movement.
noun (plural)Aponeuroses are the plural form of aponeurosis: flat, sheet-like bands of dense fibrous connective tissue that attach muscles to bones or to other muscles, serving much the same role as tendons but spread over a broad area.
- Plural of aponeurosis: flat sheets of white fibrous connective tissue by which muscles attach to bones or to other muscles.
"The surgeon carefully incised the palmar aponeuroses to release the contracted fingers."
"The anterior abdominal wall is reinforced by broad aponeuroses that interweave at the midline."
"In dissection class, we identified the glistening aponeuroses overlying the lumbar muscles."
Use 'aponeuroses' for more than one fibrous sheet and 'aponeurosis' for a single sheet; plural verbs agree accordingly.
"The plantar aponeuroses support the arches of both feet."
An aponeurosis is essentially a tendon that traded its cable shape for a broad sheet — your abdominal muscles pull on one like a corset of living tissue.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of aponeuroses
The word comes from modern Latin aponeurosis, borrowed from Greek aponeurōsis, formed from apo- ('away from') and neuron ('sinew, nerve'), originally denoting the end of a muscle where its fleshy fibers give way to fibrous tissue. The term entered anatomical usage in the early modern period as European anatomists systematized Greco-Greek descriptive terminology. It shares the Greek root neuron with words such as neural, neuropathy, and neurosis, though in aponeurosis the root retains its older 'sinew' sense rather than the later 'nerve' sense.
Related word forms
How aponeuroses is actually used
Strictly anatomical and technical in register, used almost exclusively in medical, surgical, and veterinary contexts. As a plural noun it takes plural verbs ('the aponeuroses are'), and it is the standard plural of aponeurosis in both British and American usage.
Easily confused with aponeuroses
Fascia is a general term for sheets of connective tissue that wrap and separate muscles and organs, whereas an aponeurosis is a specific type of fibrous sheet specialized for transmitting muscular force, analogous to a flattened tendon.