Flashcards in Dorsum - Lab Deck (69):
what forms the medial marginal vein?
medial dorsal digital vein of the great toe AND dorsal venous arch
where does the great saphenous vein begin?
anterior to the medial malleolus
what forms the lateral marginal vein?
lateral dorsal digital vein of the fifth toe AND dorsal venous arch
where does the lateral marginal vein become the small saphenous vein?
inferior to the lateral malleolus
how many dorsal metatarsal veins are there?
4 - located in metatarsal spaces
where do the dorsal metatarsal veins terminate?
dorsal venous arch
what is the origin of the dorsal metatarsal veins?
dorsal digital veins of the toes
the saphenous nerve branches from what nerve?
the saphenous nerve is a sensory branch of the femoral nerve
what follows the great saphenous vein in the leg along the lateral side?
what n. follows the small saphenous v. in the leg?
what do you call the continuation of the sural n. on the lateral side of the foot?
lateral dorsal cutaneous n. of the foot
what is the name of the n. on the lateral side of the 5th toe and from what n. does it originate?
10th dorsal digital n. originates from the lateral dorsal cutaneous n. of the foot
On occassion the lateral dorsal cutaneous n. will give rise to or anastomose with what n. ?
intermediate dorsal cutaneous n.
what n. is located on the anterior surface of ankle joint?
superficial peroneal n.
what are the terminal branches of the superficial peroneal n.?
medial dorsal cutaneous n. AND intermediate dorsal cutaneous n.
the medial terminal branch of the deep peroneal communicates with what nerves?
saphenous n. and medial terminal branch of the deep peroneal
what does the medial dorsal cutaneous nerve of the foot give rise to?
1st dorsal digital n. AND 1st common dorsal digital n.
how many dorsal digital branches does the medial dorsal cutaneous n. give rise to? common dorsal digital branches?
what innervates the medial side of the great toe?
1st common dorsal digital n.
what nerve do the 4th and 5th dorsal digital nerves come from?
1st common dorsal digital
the space between toes two and three is innervated by what nerves?
4th and 5th dorsal digital nn.
what does the intermediate dorsal cutaneous n. divide into?
2nd and 3rd common dorsal digital nn.
what n. is associated with intermetatarsal space 3?
2nd common dorsal digital n.
what n. is associated with intermetatarsal space 4?
3rd common dorsal digital n.
The 10th dorsal digital n. originates from what n?
lateral dorsal cutaneous n.
The 8th dorsal digital n. originates from what n. ?
3rd common dorsal digital n. which originates from the intermediate dorsal cutaneous n. which originates from the superficial peroneal n.
what n. enters the foot from below the tendon of the extensor hallucis longus?
deep peroneal n.
what are the two terminal branches of the deep peroneal n.?
the lateral and medial terminal branches of the deep peroneal n.
what supplies the motor innervation to the extensor digitorum brevis ?
lateral terminal branch of the deep peroneal n.
the a. running laterally with the lateral terminal branch of the deep peroneal n. is a branch off of what a.?
lateral tarsal branch OF the dorsalis pedis a.
which branch of the deep peroneal a. reaches the first intermetatarsal space?
medial terminal branch
the 2nd an 3rd dorsal digital n. are branches off of what n?
medial terminal branch of the deep peroneal n.
the deep fascia is aka ?
the superior and inferior extensor retinacula are thickenings of what?
what retinaculum lies superior to the level of the malleoli and courses b/w the tibia and fibula?
superior extensor retinaculum
what tendons pass under the superior extensor retinaculum?
4 extensor digitorum longus extensor hallucis longus peroneus tertius tibialis anterior
which retinaculum is described as a y-shaped band?
inferior extensor retinaculum
the stem part of the 'y' retinaculum is know as what?
where does the frondiform ligament attach?
lateral surface of the calcaneus at sinus tarsi and sinus canal
the superomedial limb of inferior extensor retinaculum attaches where? inferomedial limb?
superior - medial malleolus inferior - blends with deep fascia along medial side of foot at cuneonavicular jt
how often is there a superolateral limb to the inferior extensor retinaculum?
25% if present it extends up to the lateral malleolus it found gives the inferior extensor retinaculum an X/cruciate shape
what surround tendons of the extensor muscles?
how many synovial sheaths can be found below the inferior extensor retinaculum?
3 1 - tibialis anterior tendon 1- extensor hallucis longus 1 - peroneus tertius and extensory digitorum longus
how many tendons does the extensor digitorum brevis have?
3 to the 2nd, 3rd, and 4th toes at times the medial tendon has a separate belly called the extensor hallucis brevis
The tendons of the extensor hallucis brevis and extensor digitorum brevis join what other tendons?
join the lateral side of the tendons of the extensor hallucis longus and extensor digitorum longus
what is the continuation of the anterior tibial a. in the foot?
dorsalis pedis a.
what a. is usually the first and largest branch of the dorsalis pedis?
lateral tarsal a. usually arises from the lateral side of the dorsalis pedis near the distal border of the inferior extensor retinaculum courses deep to extensor digitorum brevis m.
the lateral tarsal a. has communicating branches with what a?
perforating branch of the peroneal a. also anastomoses with the terminal part of the arcuate a.
the peroneal a. is a branch of what a.?
posterior tibial a.
what are the 1-2 very small aa. that may be seen arising from the medial side of the dorsalis pedis as it courses over the navicular bone?
medial tarsal aa.
what does the medial tarsal a. connect with?
medial malleolar rete (plexus of arteries superficial to the medial malleolar)
the arcuate a. is a continuation of what a.?
is the arcuate a. superficial or deep to the extensor digitorum brevis and longus?
deep the arcuate a. arises near the base of the 2nd metatarsal and courses laterally, deep to the extensor digitorum longus and brevis
which a. arise directly from the arcuate a.?
(3) 2nd, 3rd, and 4th dorsal metatarsal a.
what supplies the dorsal interosseous mm?
dorsal metatarsal a. (course directly across the anterior surface of these m.)
each dorsal metatarsal a gives rise to what a?
two dorsal digital arteries
the dorsal digital aa. eventually anastomose with what aa?
proper plantar aa.
which arteries originate from the plantar arch and perforate dorsally to join the proximal ends of the dorsal metatarsal arteries?
proximal/posterior perforating branches
what arteries do the dorsal metatarsal aa receive at the distal end?
distal/anterior perforating branches (branches of the plantar metatarsal aa)
where can you find the distal perforating branches?
lateral sides of the tendons of the dorsal interossei m.
when do the dorsal metatarsal arteries become known as the common dorsal digital aa?
after receiving the perforating branches
two dorsal digital arteries arise from one artery known as what?
common dorsal digital arteries
what are the two terminal branches of the dorsalis pedis artery?
first dorsal metatarsal a AND deep plantar a.
the 1st dorsal digital artery arises from what a.?
1st dorsal metatarsal goes to the medial side of 1st toe
which perforating branches does the 1st dorsal metatarsal a. receive?
only the distal perforating branch does not receive a proximal perforating branch since the deep plantar a. takes it place
the 1st common dorsal digital a. is formed when?
1st dorsal metatasal a. is joined by a distal perforating branch
what n. courses with the lateral tarsal a. to provide branches to extensor digitorum brevis m.?
lateral terminal branch of the deep peroneal n.
the 1st common dorsal digital a. terminates into what?
2nd and 3rd dorsal digital a.