Anatomy Lecture 3,4, Lumbar Sacral Plexus

what view is the left one from?

left anterior

what view is the right one from?

left posterior view

what is circle #1

medial condyle

what is circle #2?

lateral condyle

what is circle #3

tibial tuberosity

what is circle #4 ?

medial malleolus

what is circle #5

medial condyle

what is buuble #6

medial malleolus

what bone and view is this?

superior anterior left tibia

what is bubble #1

medial condyle

what is bubble #2 ?

lateral condyle

what is bubble #3?

tibial tuberosity

what view is the left one from?

right anterior

what view is the right one from?

right posterior

what is bubble #1?

lateral condyle (tibia)

what is bubble #2

head of fibula

what is bubble #3?

fibula

what is bubble #4

lateral malleolus (fibula)

what is bubble #5

medial condyle

what is bubble #6

tibial tuberosity

what is bubble #7

tibia

What is bubble #8

medial malleolus (tibia)

what is bubble #9

lateral condyle

What is bubble #10

head of fibula

what is bubble #11

fibula

what is bubble #12

lateral malleolus (fibula)

valgus

joint medial to the ones above and below it

varus

joint lateral to the joints above and below it

Quad Tendon

Quadriceps Femoris to Patella

Patellar Tendon

• Continuation quad tendon

• Patella to tibial 

tubercle (tuberosity

Ligaments

• Bone to Bone

• Often Restrain Motion

Tendons

• Muscle to Bone

• Transfer Force for Movement

Ligaments of Knee

• Anterior Cruciate Ligament (ACL)

• Posterior Cruciate Ligament (PCL)

• Medial Collateral Ligament (MCL)

• Lateral Collateral Ligament (LCL)

what is bubble #1?

quadriceps tendon

what is bubble #2?

patella

what is bubble #3?

patellar tendon

Anterior Cruciate Ligament (ACL)

Prevents ANTERIOR translation of tibia on femur

Posterior Cruciate Ligament
(PCL)

Prevents POSTERIOR translation of tibia on femur

Medial Collateral Ligament (MCL) (Tibial Collateral Ligament)

Prevents VALGUS instability of Knee

Lateral Collateral Ligament LCL (Fibular Collateral Ligament)

Prevents VARUS instability of knee

what is the soft tissue of the knee

• Medial Meniscus

• Lateral Meniscus

what are are you looking at and from what angle ?

the knee from the superior angle

what does bubble #1 represent?

patellar ligament

what does bubble #2 represent?

anterior cruciate ligament

what does bubble #3 represent?

medial meniscus

what does bubble #4 represent?

lateral meniscus

what does bubble #5 represent?

fibular collateral ligament

what does bubble #6 represent?

posterior cruciate ligament

Medial Meniscus

• Shock Absorber

• Attachment site MCL

• More often injured than lateral

what are the hamstring muscles ?

• Semitendinosus

• Semimembranosus

• Biceps Femoris

what are the quadricep muscles?

• Rectus Femoris

• Vastus Lateralis

• Vastus Intermedius

• Vastus Medialis

Semitendinosus Origin

Ischial tuberosity

Semitendinosus Insertion

Medial Surface of the Superior Tibia

Semitendinosus Action

Knee Flexion, Hip Extension

Semitendinosus Innervation

Sciatic nerve of the Tibia L5,S1,S2

Semimembranosus Orgin

Ischial Tuberosity

Semimembranosus Insertion

Posterior part of the medial condyle of the tibia

Semimembranosus Action

Flexes Knee, Extends Hip

Semimembranosus Innervation

Sciatic Nerve Tibial Portion (L5, S1, S2)

Biceps Femoris Origin

(Long Head) Ischial Tuberosity

(Short Head) Linea Aspera of Femur

Biceps Femoris Insertion

Fibular Head

Biceps Femoris Action

Both Heads Flex Knee, Long Head Extends Hip 

Biceps Femoris Innervation

(Long Head) Tibial Nerve (L5, S1)

(Short Head) Peroneal Nerve (L5, S1)

Rectus Femoris Origin

Anterior Inferior Iliac Spine 

Ilium superior to Acetabulum

Rectus Femoris Innervation

Femoral Nerve L2, L3, L4

Rectus Femoris Action

Knee Extension, Hip Flexion

Rectus Femoris Insertion

Tibial Tuberosity

Vastus Lateralis Origin

Posterior Lateral Femur

Vastus Lateralis Insertion

Tibial Tuberosity

Vastus Lateralis Action

Knee Extension

Vastus Lateralis Innervation

Femoral Nerve L2, L3, L4

Vastus Intermedius Origin

Anterior Lateral Femur

Vastus Intermedius Insertion

Tibial Tuberosity

Vastus Intermedius Action

 Knee Extension

Vastus Intermedius Innervation

Femoral Nerve L2,L3,L4

Vastus Medialis Origin

Anterior Medial Femur

Vastus Medialis Insertion

Tibial Tuberosity

Vastus Medialis Action

Knee Extension

Vastus Medialis Innervation

Femoral Nerve L2,L3,L4

Sciatic Nerve

• Roots: L4-S3

Tibial Nerve

• Roots: L4-S3

• Muscles Innervated:

Long head of biceps femoris

Semitendinosus

Semimembranosus

Adductor magnus (hamstring portion)

• Location: Sciatic Nerve divides into tibial and Peroneal (Fibular)

What does the sciatic nerve divide into ?

Tibial and Peroneal

Peroneal Nerve

• Roots: L4-S2

• Muscles Innervated:

None (Gives rise to 

superficial and deep branches)

• Location: Sciatic Nerve divides into tibial and Peroneal (Fibular)

Superficial Peroneal Nerve

• Roots: L5,S1,S2

• Muscles Innervated: Peroneus Longus (Next week)

• Location: Lateral leg

Deep Peroneal Nerve

• Roots: L4, L5

• Muscles Innervated: Tibialis Anterior, Extensor Hallucis Longus (Next week)

• Location: Anterior Leg

what is bubble #1?

aorta

what is bubble #2?

common iliac artery

what is bubble #3?

femoral artery

what is bubble #1?

femoral artery

what is bubble #2?

popliteal artery

what is bubble #3?

tibial arteries

what are the roots of the sciatic nerve ?

L4-S3

what are the roots of the tibial nerve

L4-S3

What are the roots of the peroneal nerve?

L4-S2

What are the roots of the superficial peroneal nerve ?

L5,S1,S2

what are the roots of the deep peroneal nerve

L4,L5

Popliteal Artery

Continuation Femoral Artery

At the Knee

what is bubble #1?

femoral artery

what is bubble #2?

popliteal

what is bubble #3?

anterior tibial