2ND LAYER O/I

Question 1

Quadratus Plantae m origin

Answer 1

medial head - medial surface of the calcaneus (inferior to the groove for flexor hallucis longus tendon)

the larger and more muscular part lateral head – trigonum plantare of calcaneus, proximolaterally (inferior aspect of the calcaneus, distal to the calcaneal lateral tubercle)

Question 2

Quadratus Plantae m insertion

Answer 2

the tendon of flexor digitorum longus muscle

Question 3

lumbricals m origin

Answer 3

first - medial side of 1st tendon of flexor digitorum longus muscle

second, third and fourth - adjacent sides of the tendons of flexor digitorum
longus muscle; one between each two tendons

– ex. the 2nd lumbrical originates from the lateral side of the 1st tendon and the medial side of the 2nd tendon of flexor digitorum longus muscle, etc.

Question 4

lumbricals m insertion

Answer 4

the medial aspect of the extensor wing portion of the extensor expansion / extensor hood apparatus at the proximal phalangeal base; the 1st
lumbrical muscle inserts into the medial extensor wing of the 2nd
metatarsophalangeal joint (MTPJ), etc.

• the tendons pass along the medial side of the respective metatarsals, then pass plantar to the deep transverse metatarsal ligament before inserting