DEX IOT DAY 1 TEST 2026 | Podiatric Medicine
& Foot Anatomy Exam Review | Complete
Questions with WELL DETAILED VERIFIED
Answers | Sesamoid Bones, Foot Structure,
Clinical Assessment | Latest Updated 2026 | A+
Graded
Q1. How many bones are found in the human foot?
A) 24 B) 22 C) 28 D) 30 E) 26
RATIONALE: The human foot contains 26 bones: 7 tarsals, 5 metatarsals, and 14
phalanges. This is the standard anatomical count for a normal adult foot.
Q2. Where are the sesamoid bones of the foot most commonly located?
A) Under the 5th metatarsal head B) Within the calcaneus C) Under the 2nd metatarsal head
D) Under the 1st metatarsal head E) Within the cuboid
RATIONALE: The two sesamoid bones of the foot are embedded within the tendons of the
flexor hallucis brevis and sit beneath the first metatarsal head. They serve to protect the tendon
and increase its mechanical advantage.
Q3. Which tarsal bone articulates directly with the tibia and fibula?
A) Navicular B) Calcaneus C) Cuboid D) Talus E) Cuneiforms
RATIONALE: The talus (astragalus) is the only tarsal bone that directly articulates with the
leg bones — the tibia superiorly and medially, and the fibula laterally — forming the ankle
(talocrural) joint.
Q4. The calcaneus articulates with which of the following bones?
A) Talus and navicular B) Talus and cuboid C) Cuboid and navicular D) Navicular and first
cuneiform E) Talus and tibia
,RATIONALE: The calcaneus (heel bone) articulates anteriorly with the cuboid and
superiorly/anteriorly with the talus via three articular facets (anterior, middle, and posterior).
Q5. What is the primary function of the sesamoid bones in the foot?
A) Provide attachment for the plantar fascia B) Form the medial longitudinal arch C) Protect
the flexor hallucis longus tendon and act as a fulcrum D) Stabilize the ankle joint E) Bear the
body weight at heel strike
RATIONALE: The sesamoid bones protect the flexor hallucis longus tendon from friction
and compression as it runs beneath the first metatarsal head, and they act as a pulley/fulcrum to
increase the mechanical advantage of the flexor hallucis brevis.
Q6. Which of the following correctly describes the medial longitudinal arch of the foot?
A) Formed by the calcaneus, cuboid, and lateral metatarsals B) Supported primarily by the
peroneus longus tendon C) Formed by the calcaneus, talus, navicular, cuneiforms, and
first three metatarsals D) Maintained solely by bony architecture E) Absent in normal adult feet
RATIONALE: The medial longitudinal arch spans from the calcaneus through the talus,
navicular, three cuneiforms, and the medial three metatarsals. It is the highest and most important
arch of the foot, supported by the plantar fascia, tibialis posterior, and intrinsic muscles.
Q7. The lateral longitudinal arch of the foot is formed by which bones?
A) Calcaneus, talus, and fifth metatarsal B) Calcaneus, cuboid, and fourth and fifth
metatarsals C) Calcaneus, navicular, and fourth metatarsal D) Talus, cuboid, and fifth metatarsal
E) Calcaneus, cuboid, and first metatarsal
RATIONALE: The lateral longitudinal arch is lower and less flexible than the medial arch.
It is composed of the calcaneus, cuboid, and the 4th and 5th metatarsals, and it bears significant
weight during the stance phase.
Q8. The transverse arch of the foot is best described as:
,A) Running along the medial border of the foot B) Formed exclusively by the metatarsal heads
C) Formed by the cuneiforms, cuboid, and bases of the metatarsals D) A structure that
flattens completely during weight-bearing E) Supported primarily by the Achilles tendon
RATIONALE: The transverse arch runs across the width of the foot and is formed by the
three cuneiforms, the cuboid, and the bases of the five metatarsals. The peroneus longus tendon
plays a key role in its dynamic support.
Q9. Which muscle is primarily responsible for inversion of the foot?
A) Peroneus longus B) Peroneus brevis C) Tibialis anterior D) Extensor digitorum longus
E) Flexor digitorum longus
RATIONALE: The tibialis anterior is the primary invertor of the foot. It also dorsiflexes the
ankle. It originates on the lateral tibia and inserts on the medial cuneiform and the base of the
first metatarsal.
Q10. Eversion of the foot is primarily performed by which muscles?
A) Tibialis anterior and tibialis posterior B) Flexor hallucis longus and flexor digitorum longus
C) Peroneus longus and peroneus brevis D) Extensor digitorum longus and extensor
hallucis longus E) Gastrocnemius and soleus
RATIONALE: Eversion (turning the sole outward) is performed mainly by the peroneus
longus and peroneus brevis, which run behind the lateral malleolus and insert on the plantar
surface of the foot and the base of the 5th metatarsal, respectively.
Q11. The plantar fascia originates from which structure?
A) The head of the first metatarsal B) The navicular tuberosity C) The medial calcaneal
tubercle D) The base of the fifth metatarsal E) The sustentaculum tali
RATIONALE: The plantar fascia (plantar aponeurosis) originates from the medial calcaneal
tubercle and fans out distally to insert at the bases of the proximal phalanges and the plantar
plates. It is a major static stabilizer of the longitudinal arch.
Q12. Plantar fasciitis most commonly presents with pain at which location?
, A) The metatarsal heads B) The midfoot C) The lateral heel D) The medial calcaneal
tubercle E) The Achilles tendon insertion
RATIONALE: Plantar fasciitis classically causes pain at the medial calcaneal tubercle,
which is the origin of the plantar fascia. The pain is typically worst with the first steps in the
morning (post-static dyskinesia).
Q13. Which nerve is responsible for sensation over the dorsum of the foot?
A) Sural nerve B) Medial plantar nerve C) Lateral plantar nerve D) Deep peroneal nerve E)
Saphenous nerve
RATIONALE: The deep peroneal nerve provides sensation to the first dorsal web space
(between the 1st and 2nd toes) and motor innervation to the dorsal foot muscles. The superficial
peroneal nerve provides sensation to most of the dorsum, but the deep branch specifically covers
that web space.
Q14. Sensation to the medial aspect of the sole is provided by which nerve?
A) Sural nerve B) Medial plantar nerve C) Lateral plantar nerve D) Saphenous nerve E)
Tibial nerve directly
RATIONALE: The medial plantar nerve, a branch of the tibial nerve, provides sensation to
the medial two-thirds of the plantar surface of the foot and motor innervation to the intrinsic
muscles of the medial foot (abductor hallucis, flexor digitorum brevis, flexor hallucis brevis, first
lumbrical).
Q15. The sural nerve provides cutaneous sensation to which region of the foot?
A) Medial sole B) Dorsal web space between 1st and 2nd toes C) All plantar surfaces D)
Lateral aspect of the foot and heel E) Dorsal surface between 3rd and 4th toes
RATIONALE: The sural nerve (formed from branches of the tibial and common peroneal
nerves) provides sensory innervation to the lateral aspect of the foot, the lateral heel, and the
lateral and dorsal fifth toe.
Q16. Morton's neuroma most commonly occurs between which metatarsals?
& Foot Anatomy Exam Review | Complete
Questions with WELL DETAILED VERIFIED
Answers | Sesamoid Bones, Foot Structure,
Clinical Assessment | Latest Updated 2026 | A+
Graded
Q1. How many bones are found in the human foot?
A) 24 B) 22 C) 28 D) 30 E) 26
RATIONALE: The human foot contains 26 bones: 7 tarsals, 5 metatarsals, and 14
phalanges. This is the standard anatomical count for a normal adult foot.
Q2. Where are the sesamoid bones of the foot most commonly located?
A) Under the 5th metatarsal head B) Within the calcaneus C) Under the 2nd metatarsal head
D) Under the 1st metatarsal head E) Within the cuboid
RATIONALE: The two sesamoid bones of the foot are embedded within the tendons of the
flexor hallucis brevis and sit beneath the first metatarsal head. They serve to protect the tendon
and increase its mechanical advantage.
Q3. Which tarsal bone articulates directly with the tibia and fibula?
A) Navicular B) Calcaneus C) Cuboid D) Talus E) Cuneiforms
RATIONALE: The talus (astragalus) is the only tarsal bone that directly articulates with the
leg bones — the tibia superiorly and medially, and the fibula laterally — forming the ankle
(talocrural) joint.
Q4. The calcaneus articulates with which of the following bones?
A) Talus and navicular B) Talus and cuboid C) Cuboid and navicular D) Navicular and first
cuneiform E) Talus and tibia
,RATIONALE: The calcaneus (heel bone) articulates anteriorly with the cuboid and
superiorly/anteriorly with the talus via three articular facets (anterior, middle, and posterior).
Q5. What is the primary function of the sesamoid bones in the foot?
A) Provide attachment for the plantar fascia B) Form the medial longitudinal arch C) Protect
the flexor hallucis longus tendon and act as a fulcrum D) Stabilize the ankle joint E) Bear the
body weight at heel strike
RATIONALE: The sesamoid bones protect the flexor hallucis longus tendon from friction
and compression as it runs beneath the first metatarsal head, and they act as a pulley/fulcrum to
increase the mechanical advantage of the flexor hallucis brevis.
Q6. Which of the following correctly describes the medial longitudinal arch of the foot?
A) Formed by the calcaneus, cuboid, and lateral metatarsals B) Supported primarily by the
peroneus longus tendon C) Formed by the calcaneus, talus, navicular, cuneiforms, and
first three metatarsals D) Maintained solely by bony architecture E) Absent in normal adult feet
RATIONALE: The medial longitudinal arch spans from the calcaneus through the talus,
navicular, three cuneiforms, and the medial three metatarsals. It is the highest and most important
arch of the foot, supported by the plantar fascia, tibialis posterior, and intrinsic muscles.
Q7. The lateral longitudinal arch of the foot is formed by which bones?
A) Calcaneus, talus, and fifth metatarsal B) Calcaneus, cuboid, and fourth and fifth
metatarsals C) Calcaneus, navicular, and fourth metatarsal D) Talus, cuboid, and fifth metatarsal
E) Calcaneus, cuboid, and first metatarsal
RATIONALE: The lateral longitudinal arch is lower and less flexible than the medial arch.
It is composed of the calcaneus, cuboid, and the 4th and 5th metatarsals, and it bears significant
weight during the stance phase.
Q8. The transverse arch of the foot is best described as:
,A) Running along the medial border of the foot B) Formed exclusively by the metatarsal heads
C) Formed by the cuneiforms, cuboid, and bases of the metatarsals D) A structure that
flattens completely during weight-bearing E) Supported primarily by the Achilles tendon
RATIONALE: The transverse arch runs across the width of the foot and is formed by the
three cuneiforms, the cuboid, and the bases of the five metatarsals. The peroneus longus tendon
plays a key role in its dynamic support.
Q9. Which muscle is primarily responsible for inversion of the foot?
A) Peroneus longus B) Peroneus brevis C) Tibialis anterior D) Extensor digitorum longus
E) Flexor digitorum longus
RATIONALE: The tibialis anterior is the primary invertor of the foot. It also dorsiflexes the
ankle. It originates on the lateral tibia and inserts on the medial cuneiform and the base of the
first metatarsal.
Q10. Eversion of the foot is primarily performed by which muscles?
A) Tibialis anterior and tibialis posterior B) Flexor hallucis longus and flexor digitorum longus
C) Peroneus longus and peroneus brevis D) Extensor digitorum longus and extensor
hallucis longus E) Gastrocnemius and soleus
RATIONALE: Eversion (turning the sole outward) is performed mainly by the peroneus
longus and peroneus brevis, which run behind the lateral malleolus and insert on the plantar
surface of the foot and the base of the 5th metatarsal, respectively.
Q11. The plantar fascia originates from which structure?
A) The head of the first metatarsal B) The navicular tuberosity C) The medial calcaneal
tubercle D) The base of the fifth metatarsal E) The sustentaculum tali
RATIONALE: The plantar fascia (plantar aponeurosis) originates from the medial calcaneal
tubercle and fans out distally to insert at the bases of the proximal phalanges and the plantar
plates. It is a major static stabilizer of the longitudinal arch.
Q12. Plantar fasciitis most commonly presents with pain at which location?
, A) The metatarsal heads B) The midfoot C) The lateral heel D) The medial calcaneal
tubercle E) The Achilles tendon insertion
RATIONALE: Plantar fasciitis classically causes pain at the medial calcaneal tubercle,
which is the origin of the plantar fascia. The pain is typically worst with the first steps in the
morning (post-static dyskinesia).
Q13. Which nerve is responsible for sensation over the dorsum of the foot?
A) Sural nerve B) Medial plantar nerve C) Lateral plantar nerve D) Deep peroneal nerve E)
Saphenous nerve
RATIONALE: The deep peroneal nerve provides sensation to the first dorsal web space
(between the 1st and 2nd toes) and motor innervation to the dorsal foot muscles. The superficial
peroneal nerve provides sensation to most of the dorsum, but the deep branch specifically covers
that web space.
Q14. Sensation to the medial aspect of the sole is provided by which nerve?
A) Sural nerve B) Medial plantar nerve C) Lateral plantar nerve D) Saphenous nerve E)
Tibial nerve directly
RATIONALE: The medial plantar nerve, a branch of the tibial nerve, provides sensation to
the medial two-thirds of the plantar surface of the foot and motor innervation to the intrinsic
muscles of the medial foot (abductor hallucis, flexor digitorum brevis, flexor hallucis brevis, first
lumbrical).
Q15. The sural nerve provides cutaneous sensation to which region of the foot?
A) Medial sole B) Dorsal web space between 1st and 2nd toes C) All plantar surfaces D)
Lateral aspect of the foot and heel E) Dorsal surface between 3rd and 4th toes
RATIONALE: The sural nerve (formed from branches of the tibial and common peroneal
nerves) provides sensory innervation to the lateral aspect of the foot, the lateral heel, and the
lateral and dorsal fifth toe.
Q16. Morton's neuroma most commonly occurs between which metatarsals?
