quadratus plantae muscle

(redirected from Quadratus plantae)

quad·ra·tus plan·tae mus·cle

(kwah-drā'tŭs plan'tē mŭs'ĕl)
Origin, by two heads from the lateral and medial borders of the inferior surface of the calcaneus; insertion, tendons of flexor digitorum longus; action, assists long flexor; nerve supply, lateral plantar.
Synonym(s): musculus quadratus plantae [TA] .
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Fiber type composition of the human quadratus plantae muscle: a comparison of the lateral and medial heads.
A review of the function of the quadratus plantae. Foot Ankle Online J., 2(11):5, 2009.
The tendon of insertion was 5.5 cm long and coursed through the tarsal tunnel before blending extensively with the fibers of the quadratus plantae muscle.
Conversely, AFDL is speculated to represent an evolutionary remnant of the portion of the flexor hallucis longus muscle that migrated from the leg to the plantar foot to become the medial head of the quadratus plantae muscle [16, 35, 36].
Caption: FIGURE 2: Dissection of left leg and foot to show accessory flexor digitorum longus muscle (AFDL: accessory flexor digitorum longus muscle; CT: calcaneal tendon; FDL: flexor digitorum longus tendon; FHL: flexor hallucis longus tendon; TP: tibialis posterior tendon; QP: quadratus plantae muscle).
The venter of the flexor digitorum accessorius longus muscle (FDALM) originates in the leg, extending through the flexor retinaculum, and is applied to the flexor digitorum longus muscle's and/or quadratus plantae distal tendons.
According to these authors, this variation has been reported with different names: accesorium ad calcaneum by Gantzer and Wood, accesorius ad accesorium by Turner, peroneus calcaneus by Turner, accesorius secundus by Humphry, accessorius quadratus plantae (Testut; Turner; Driver & Deninson; Sooriakumaran & Sivananthan; Georgiev et al, 2009).
At this level, the FDALM can be fused with the quadratus plantae muscle, as well as with the flexor digitorum longus muscle, according to what type of muscular variation concerned.
In the sole, both fascicles of the FDALM follow the medial margin of the quadratus plantae muscle, and the internal fascicle merges with this muscle.
At the point of junction of the medial and lateral head, the quadratus plantae muscle attaches.
Lesbre mentioned a small accessory muscle isolated from the base of the calcaneus, not identifying it as the quadratus plantae muscle.