1. Joints & Ligaments of the Foot
1- The talo-calcanean (subtalar)
joint
Type: Synovial , plane
Articular surfaces: Body of talus
(inferior surface) and calcaneus
(superior surf.)
Capsule: Attached to the
Margins of the articular
surfaces.

2. Ligaments: Talocalcaneal ligaments: Medial, lat. , post
Ligaments: Talocalcaneal ligaments: Medial, lat., post., and interosseous.
Movements: 1.Inversion (like supination) = Turing the sole medially + slight planter flexion. It is done by Tibialis anterior and posterior.
2. Eversion (like pronation) = Turning the sole laterally + slight dorsiflexion. It is done by Peroneus longus, brevius, and tertius.

3. 2-The talo-calcaneo-navicular Joint
Type: Synovial, Ball and Socket Articular surfaces: Head of talus (ball), calcaneus, and navicular.(socket). The sockets move and not the ball.

4. Ligaments: 1- Spring (planter calcaneo-navicular) ligament.
2- Deltoid ligament.
- The head of talus rests on the spring ligament. If this ligament becomes weak, the head of talus sinks in the space between the sustentaculum tali and the navicular ----► Flat foot.
- The spring ligament is important for the formation of the medial longitudinal arch of the foot.

5. 3. medial limb of bifurcate
ligament.
Movements: Gliding,
inversion
and eversion.

6. 3-The calcaneo-cuboid joint
Type: Synovial, plane
Articular surfaces: Ant. end of calcaneus and post. surface of cuboid.

7. Ligaments: 1. The bifurcate lig.
which is V- shaped, between
calcaneus and navicular
(medial limb) and calcaneus
and cuboid (lateral limb) on
the dorsal surface.
2. The short planter ligament:
Between the planter surface
of the calcaneum and cuboid.
3. The long planter ligament:
of the calcaneus and the bases
of the 2nd, 3rd, and 4th metatarsals.
Movements: Inversion and Eversion.
Joints 2 and 3 are called the mid-
tarsal joints.
During inversion and eversion the
talus is fixed while the other bones
swing around it.

10. Thank You