Innervations of the Foot Flashcards
sciatic nerve divides into?
common fibular nerve
tibial nerve
common fibular nerve divides into?
deep fibular n.
superficial fibular n.
sural nerve is formed by?
communicating ramus from lateral sural cutaneous nerve + medial sural cutaneous nerve (which is a branch of the tibial n.)
deep fibular n. is a branch of?
common fibular n
deep fibular n. innervates what compartment?
anterior leg
deep fibular n. courses
deep to the deep fascia with the anterior tibial vessels
on the dorsum of the foot, the deep fibular divides into
medial and lateral terminal branch
medial terminal branch follows the course of
the dorsal pedis a.
medial terminal branch becomes superficial
as it pierces the deep fascia at the proximal aspect of the 1st interspace
medial terminal branch divides into
2 dorsal proper digital n. for the adjacent sides of the hallux and 2nd toe
lateral terminal branch follows the course of
the lateral tarsal a
lateral terminal branch innervates what muscles
EHB
EDB
superficial fibular n is a branch of
common fibular n
superficial fibular n. innervates what compartment
lateral leg compartment
superficial fibular n. pierces the deep fascia in the —of the leg
lower 1/3
superficial fibular n. innervates —after it pierces the deep fascia
skin on the lower anterolateral aspect of the leg
—to the malleoli the superficial fibular n. divides into —- and —-
Proximal
medial dorsal cutaneous n.
intermediate dorsal cutaneous n
medial dorsal cutaneous n. is a branch of
superficial fibular n. in the lower leg
on the dorsum of the foot, the medial dorsal cutaneous n. divides into
dorsal proper digital br.
dorsal common digital br.
the dorsal proper digital br of the medial dorsal cutaneous n. innervates
the skin on the dorsomedial aspect of the hallux
the dorsal proper digital branch of the medial dorsal cutaneous n. communicates with
the medial terminal branch of the deep fibular n. and the saphenous n
the dorsal common digital branch of the medial dorsal cutaneous n. divides into
2 dorsal proper digital branches for the skin on the adjacent sides of the 2nd and 3rd toes
medial dorsal cutaneous nerve innervates
the skin on the dorsomedial side of the foot
intermediate dorsal cutaneous nerve also called?
Lemont’s nerve
intermediate dorsal cutaneous nerve branches from
the superficial fibular nerve in the lower leg region
intermediate dorsal cutaneous nerve divides into — and — on the dorsum of the foot
medial dorsal common digital branch
lateral dorsal common digital branch
medial dorsal common digital branch of the intermediate dorsal cutaneous nerve divides into
2 dorsal proper digital branches for the sin on the adjacent sides of the 3rd and 4th toes
lateral dorsal common digital branch of the intermediate dorsal cutaneous nerve divides into
2 dorsal proper digital branches for the skin on the adjacent sides of the 4th and 5th toes
lateral dorsal common digital br. of the intermediate dorsal cutaneous n. communicates with
the lateral dorsal cutaneous nerve
the intermediate dorsal cutaneous n. innervates
the skin on the dorsointermediate side of the foot
the intermediate dorsal cutaneous nerve may also branch from
sural n.
OR
lateral dorsal cutaneous n
lateral dorsal cutaneous nerve is a continuation of
sural nerve as it course below the lateral malleolus
the lateral dorsal cutaneous nerve course along
the dorsoateral side of the foot innervating the skin in this region
the lateral dorsal cutaneous nerve terminates as
a dorsal proper digital nerve to the dorsolateral side of the 5th toe
the lateral dorsal cutaneous nerve communicates with
the lateral dorsal common digital branch of the intermediate dorsal cutaneous n
saphenous nerve is a branch of
the femoral nerve in the thigh
saphenous nerve courses with
the great saphenous vein in the leg
saphenous nerve terminates on
the dorsum of the foot
on the dorsum of the foot the saphenous n. innervates
the skin on the medial side of the foot up to the 1st MTP
saphenous n. is the only nerve of the foot that is not a branch of
the sciatic nerve
medial plantar n. is a branch of
tibial n
medial plantar n courses
distally with the medial plantar vessels b/w abductor hallucis and flexor hallucis brevis
as the medial plantar n. courses distally it gives off
cutaneous, muscuarl and articular branches
medial plantar n terminates by
dividing into a plantar proper digital and 3 plantar common digital branches
cutaneous branches of the medial plantar n innervate
the skin on the medioplantar aspect of the foot
muscular branches of the medial plantar nerve innervate — before medial plantar nerve divides
- abductor halluics
- FHB
articular branches of the medial plantar nerve innervate
joints on the medial portion of the tarsus
plantar proper digital br of the medial plantar n innervates
- FHB
- skin on the medioplantar aspect of the hallux
1st planatar common digital branch of the medial plantar nerve innervates
1st lumbrical muscle, then divides into 2 plantar proper digital branches for the skin on the adjacent sides of the hallux and 2nd toes
2nd plantar common digital br of the medial plantar nerve divides into
2 plantar proper digital branches for the skin on the adjacent sides o the 2nd and 3rd toes
3rd plantar common digital br of the medial plantar nerve divides into
2 plantar proper digital branches fot ehs kin on the adjacent sides of the 3rd and 4th toes
3rd plantar common digital br of the medial plantar nerve communicates with
plantar common digital br of the superficial division of the lateral plantar n
3rd plantar common digital br is the common site of
a Morton’s neuroma
lateral plantar n. is a branch of
tibial n
lateral plantar n. courses
distally giving off cutaneous, muscular and articular branches
lateral plantar n. terminates by
dividing into a superficial and deep branch
cutaneous branch of the lateral plantar n. innervates
skin on the lateroplantar aspect of the foot
muscular branches of the lateral plantar n innervate
aductor digiti minimi
quadratus plantae
before the lateral plantar nerve divides into a superficial and deep branch
articular branch of the lateral plantar n. innervate
joints on the lateral portion of the tarsus
entrapment of the 1st branch of the lateral plantar n. to the abductor digiti minimi is called
Baxter’s Nerve
Baxter’s nerve causes —pain
heel pain due to its sensory innervations of the periosteum of the calcaneus in this area
superficial branch of the lateral plantar n divides into
plantar proper digital br
plantar common digital br
plantar proper digital br of the superficial br innervates
FDMB
4th dorsal interosseous
3rd plantar interosseous
skin on the lateroplantar aspect of the 5th toe
plantar common digital br of the lateral plantar n. divides into
2 plantar proper digital branches for the skin on the adjacent sides of the 4th and 5th toes
plantar common digital br of the lateral plantar n. communicates with
3rd plantar common digital br of the medial plantar n
deep branch of the lateral plantar n courses with
the plantar arch portion of the lateral plantar a
deep branch of the lateral plantar n innervates
adductor hallucis
2nd, 3rd, 4th lumbricals
1st, 2nd, 3rd dorsal interosseous
1st, 2nd plantar interosseous
medial calcaneal n is a branch of
tibial n
medial calcaneal n. innervates
skin on the plantar and medial aspect of the heel
entrapment of the medial calcaneal n. is a common cause of
heel pain
lateral calcaneal n. is a branch of
sural n
lateral calcaneal n. innervates
skin on the posterior and lateral aspect of the heel
dorsal proper digital nerves terminate
around the base and sides of the nails
plantar proper digital nerves terminate
in the area of the ungual tuberosity by sending branches to the distal end of the digit
to form a digital black, what nerves are anesthetized
all 4 digital nerves