Last things to remember test 1

Question 1

What does the saphenous N innervate?

Answer 1

skin along medial side of foot as far as base of 1st met

Question 2

What is the function of the lumbricals?

Answer 2

On contraction, tighten wing and loosen sling allowing more proximal parts of the extensor expansion to permit flexion at the MPJ while holding the more distal joints in extension

Question 3

medial (deep root) of frondiform ligament attachment?

Answer 3

sulcus tali posterior to the attachment of the interosseous talocalcaneal ligament

Question 4

What takes partial origin at base of fifth met?

Answer 4

Flexor digiti quinti brevis

Question 5

os uncinatum

Answer 5

lateral cuneiform

Question 6

Where does the central slip of the EDL insert onto digits 2-5?

Answer 6

base of the middle phalanx

Question 7

Where does the dorsalis pedis divide into the terminal branches?

Answer 7

base of the second met/1st inter metatarsal space-deep plantar and 1st dorsal metatarsal A

Question 8

Where is os tibiale (externum) located?

Answer 8

navicular tuberosity

Question 9

What forms the extensor sling?

Answer 9

fibers which encircle the digit to attach to a thickening in the plantar MP ligament called the plantar plateWhat forms-interosseous muscles contribute

Question 10

What kind of joint are metatarsophalangeal? Interphalangeal?

Answer 10

ellipsoid, hinge

Question 11

Describe what the superomedial branch of inferior extensor retinaculum does?

Answer 11

superficial layer passes superficial to tendon of EHL, anterior tibial A and V and deep fibular N. After passing EHL tendon, it fuses with deep layer and forms a tunnel for the tendon of tibias anterior

Question 12

What is different about the extensor expansion of the hallux?

Answer 12

only the EHL is attached, IO and lumbricals don’t contribute to wing and sling-on medial side, formed by abductor hallucis and medial head of FHB, on lateral adductor hallucis and lateral head of FHB

Question 13

What does the lateral tarsal A anastomose with?

Answer 13

lateral plantar A, perforating branch of peroneal A, arcuate A and anterior lateral malleolar rete

Question 14

What kind of joint are tarsometatarsal? Intertarsal?

Answer 14

gliding, gliding

Question 15

Muscle attachments at base of 2-4th mets

Answer 15

tibialis posterior, oblique head of adductor hallucis, long plantar ligament

Question 16

Intermediate root of frondiform ligament attachment?

Answer 16

deeper portions of sulcus calcanei

Question 17

What kind of joint is talonavicular? Calcaneocuboid?

Answer 17

ball and socket, saddle

Question 18

What forms the extensor wing?

Answer 18

mostly from expansions of the tendons of the lumbrical muscles

Question 19

Function of interosseous muscles?

Answer 19

ab/adduction-some people consider them to fxn as lumbricals as well

Question 20

Frondiform ligament attachment?

Answer 20

dorsal and anterior aspect of calcaneus just anterior to sulcus calcanei

Question 21

The medial root of the frondiform ligament does what?

Answer 21

forms a loop (sling) around tendons of EDL and peroneus tertius muscles

Question 22

3rd and 4th most common sesamoid bones?

Answer 22

sesamoid bone in tibias anterior at medial cuneiform, os peroneum in peroneus longs at cuboid

Question 23

Insertion of EDB and EHB?

Answer 23

dorsal proximal phalanx for EHB, lateral surface of EBL tendons just distal to MPJ for 2-4 digits

Question 24

What accessory muscle inserts onto plantar surface of base of fifth met?

Answer 24

abductor os metatarsi digiti minimi

Question 25

Where is os trigonum located?

Answer 25

lateral tubercle of posterior talus

Question 26

os veslianum

Answer 26

tuberosity of fifth met

Question 27

Os intermetatarsium

Answer 27

between medial cuneiform and 1st and 2nd met

Question 28

What forms the groove on the plantar fifth met? What attaches here?

Answer 28

abductor digiti minimi, plantar ligament of the sole

Question 29

What is the function of the EDL?

Answer 29

tighten sling, loosen wing-when contracted, plantar plate pulls against MP joint extending MPJ-it can’t extend IPJ because the wing portion of the extensor hood is loose

Question 30

What is found on the medial and lateral sides of the dorsalis pedis A in the dorsum of foot?

Answer 30

tendon of EHL on medial and EDL on lateral

Question 31

Where does the dorsalis pedis give off the lateral and medial tarsal A?

Answer 31

neck of talus

Question 32

Muscle attachments at base of 1st met

Answer 32

tibialis anterior medial, peroneus longus lateral

Question 33

In the absence of the arcuate A, where do the 2-4 dorsal metatarsal A come from ?

Answer 33

posterior perforating A

Question 34

Origin of EDB?

Answer 34

superolateral surface of calcaneus just anterior to sinus tarsi-from IO talocalcaneal and frondiform ligament

Question 35

Where do the two lateral slips of the EDL insert onto digits 2-5?

Answer 35

rejoin as terminal slip and insert onto base of distal phalanx

Question 36

What is the more proximal part of the extensor hood?

Answer 36

sling

Question 37

muscle attachment to styloid process of fifth met? to dorsal fifth met?

Answer 37

peroneus brevis to styloid, peroneus tertius to dorsal

Question 38

What kind of joint is ankle? Subtalar joint?

Answer 38

hinge, gliding/plane

Question 39

What does the medial terminal branch of the deep peroneal accompany in the dorsal of the foot?

Answer 39

dorsalis pedis