Basics. Exam 3.

Joint Type, Articulating Surfaces, Ligaments, Movements, Innervation, Blood Supply. [Lec 7, 8,9] done as of 4/13/26]

Classification of Sacroiliac Joint (2x)

Anteriorly - synovial

Posterior - syndesmosis

Articulating surfaces of the Sacroiliac Joint

auricular surfaces of sacrum and ilium

Ligaments of the Sacroiliac Joint (8x)

1. anterior sacroiliac lig

2. sacrospinous lig

3. iliolumbar lig

4. lateral lumbosacral lig

5. posterior sacroiliac lig

6. interosseous sacroiliac lig

7. sacrotuberous lig

8. longitudinal posterior sacroiliac lig

Innervation of the Sacroiliac Joint

Branches from:

1. anterior and posterior rami of 1st, 2nd sacral spinal nerves

2. superior gluteal nerves

May Contribute:

1. obturator nerve

2. lumbrosacral trunk

Blood Supply Pathway of Sacroiliac Joint

left common iliac → internal iliac → posterior division → iliolumbar, lateral sacral, superior gluteal a.

Main Function of the Sacroiliac Joint (2)

1. relieves stress on pelvic girdle during movement of trunk and lower appendage during muscle contraction

2. Handles body weight and ground reaction forces

Classification of Hip Joint

Synovial Ball and Socket

Articulating surfaces of the Hip Joint

1. acetabulum - lunate surface, fossa, fibrocartilage fat

2. acetabular labrum

3. head of femur

Capsule Attachments of Hip Joints (4)

1. neck of femur

2. greater trochanter and intertrochanteric crest

3. intertrochanteric line

4. acetabulum

Movements at Hip Joint

Flexion, extension, abduction, adduction, internal rotation, external rotation, circumduction

Ligaments of Hip Joint (6x)

1. transverse acetabular lig

2. lig of head of femur (round lig)

3. iliofemoral lig

4. pubofemoral lig

5. ischiofemoral lig

6. zona orbicularis

Innervation of Hip Joint (4)

1. femoral n

2. obturator n

3. nerve to quadratus femoris

4. superior gluteal n

First Blood supply pathway of Hip Joint

left common iliac → internal iliac → posterior division → superior gluteal a.

second blood supply pathway of the hip

left common iliac → internal iliac → anterior division → obturator a., interior gluteal a.

Third Blood supply pathway to Hip Joint

(left) common iliac → external iliac → femoral → profunda femoris → medial circumflex femoral, lateral circumflex femoral → ascending branch

Function of Hip Joint

1. support weight and movements of upper body

2. supports lower body movements

The knee joint complex is composed of what two joints?

Tibiofemoral, Patellofemoral

Classification of Joint Type Knee (include both)

Tibiofemoral - double condyloid

Patellofemoral - synovial

The knee complex as a whole is classified as

modified hinge joint

Ligaments of Knee Complex (10x)

1. Transverse lig of knee

2. Coronary lig

3. Anterior cruciate lig

4. Posterior cruciate lig

5. Posterior menisco-femoral lig

6. Tibial collateral lig

7. Fibular collateral lig

8. Patellar lig

9. Oblique popliteal lig

10. Arcuate popliteal lig

Movements of knee

Flex/Ext

Med rot/Lat rot

Abd/Add

Innervation of Knee Complex (4x)

Branches from

1. Femoral n

2. Obturator n

3. Common peroneal n

4. Tibial n

First blood supply pathway of Knee joint

descending branch of lateral circumflex femoral a.

Second blood supply pathway of Knee joint complex

articular branch of Descending genicular a

Third blood supply pathway of knee

popliteal a. → superior and inferior; medial and lateral genicular aa. (4x)

Fourth blood supply pathway of knee

anterior tibial a → anterior and posterior tibial recurrent aa.

Proximal Tibiofibular Joint Classification Type

Synovial Plane

Articulating surfaces of Proximal Tibiofibular Joint

1. Head of fibula

2. posteroinferior aspect of lateral tibial condyle

Ligaments of Proximal Tibiofibular Joint

1. anterior lig of fibular head

2. posterior lig of fibular head

Movements at the Proximal Tibiofibular Joint

Slide/Glide

Innervation of the Proximal Tibiofibular Joint

Branches from:

1. common fibular n.

2. tibial n.

Blood supply of the Proximal Tibiofibular Joint

Anterior and posterior tibial recurrent aa.

Distal Tibiofibular Joint Type Classification

Syndesmosis

Articulating Surfaces of the Distal Tibiofibular Joint

1. medial convex surface on distal fibula

   1. fibular notch of tibia

Ligaments of Distal Tibiofibular Joint

1. Anterior tibiofibular lig

2. Posterior tibiofibular lig

3. Interosseous lig (of Distal Tibiofibular Joint)

Movements at the Distal Tibiofibular Joint

no movement

Innervation of the Distal Tibiofibular Joint

Branches from:

1. Deep fibular n.

2. Sural nn.

First blood supply pathway of Distal Tibiofibular Joint

Perforating branch of fibular a

Second blood supply pathway of Distal Tibiofibular Joint

Anterior and posterior tibial arteries → auricular, malleolar, tarsal branches

Classification of Ankle Joint Type

Synovial Hinge

Articulating surfaces of ankle joint

1. lateral (fibular) and medial (tibial) malleolus

2. trochlea of talus

Medial ligament and parts thereof of Ankle Joint

Medial Collateral lig

1. posterior tibiotalar

2. tibiocalcaneal

3. tibionavicular

4. anterior tibiotalar

Lateral Ligaments of ankle joitn

Lateral Collateral Ligs

1. posterior talofibular lig

2. calcaneofibular lig

3. anterior talofibular lig

Movements at Ankle Joint

dorsiflexion/plantarflexion. inversion/eversion. add/abd

First blood supply pathway of ankle joint

perforating and communicating branches of the fibular a.

Second blood supply pathway of the ankle joint

Branches of anterior and posterior tibial aa. → tarsal, malleolar branches