0:00

Let's introduce you to the sensory

0:02

supply and nerve supply to the foot.

0:04

I'm going to concentrate on sensory right now

0:07

and save the motor for separate vignettes.

0:11

We're looking at the foot from the front,

0:13

almost an AP type projection, and we see the

0:17

sensory supply medially of the saphenous nerve,

0:21

which travels with the greater saphenous vein.

0:25

The saphenous nerve will kind of

0:27

trail off a little more posterior

0:30

as you go from proximal to distal.

0:32

So it starts out right behind the greater

0:34

saphenous vein and then drifts back a little bit.

0:37

The superficial peroneal nerve provides most of

0:42

the sensory supply to the dorsum of the foot with

0:45

the exception of this little web space right here.

0:49

And that web space is the domain of the deep

0:53

peroneal nerve. That is the nerve that gets

0:56

affected in anterior tarsal tunnel syndrome,

1:00

with a burning sensation between the first

1:03

and second toe, often confused with lumbar

1:06

radiculopathy, which is extremely dangerous.

1:11

This is also known as jogger's foot.

1:13

Some spurs and other abnormalities along

1:16

the dorsal aspect of the foot,

1:18

including thickening of the retinaculum across over

1:20

here can all contribute to this syndrome.

1:23

Then we've got the sural nerve that travels with

1:25

the lesser saphenous vein, provides some sensory

1:29

supply to the dorsolateral aspect of the foot.

1:33

Now let's go to the plantar side.

1:36

The plantar side is really owned by

1:39

the tibial nerve, which some call more

1:42

distantly the posterior tibial nerve.

1:46

It's going to give rise to three branches.

1:50

A medial,

1:51

a lateral, and a calcaneal.

1:55

Most of the important calcaneal branches

1:57

come off the lateral plantar nerve.

2:01

We're going to see later on in more advanced

2:03

discussions that the medial and lateral plantar

2:05

nerves are divided up into different compartments

2:08

in the coronal projection from proximal to distal.

2:11

But that perhaps is a story

2:13

for a more advanced

2:14

another day.

2:16

The sural nerve also gives some

2:18

supply, but very little, along the

2:20

plantar lateral aspect of the foot.

2:23

So here we've got our tibial nerve dividing

2:27

into medial plantar, lateral plantar.

2:31

The lateral plantar gives rise to most of the

2:34

divisions of the calcaneal nerve or calcaneal

2:37

branches, providing sensory supply to the heel.

2:41

And it's these branches that are

2:43

affected in Baxter's neuropathy.

2:47

Let's drill deeper in other vignettes.