Fibrous capsules surround each joint – thin dorsally and seperated from tendons by bursae. Capsule is contiguous with extensor hood expansion dorsally and plantar plate below.
• Thick fibrous structures
• Strong round “cords” on both sides of joint.
• Attached to dorsal tubercle on side of head of metatarsal runs obliquely forward attaches to base of proximal phalanx.
extensions from extensor expansion that descends on both sides of the joint to the plantar plate
• firm and flexible fibrocartilaginous plate plantar to metatarsal heads
• firmly attached to the base of the proximal phalanges
• composed mostly of type 1 collagen
• measures 20mm in length and 2mm in thickness
• acts as a ‘central’ attachment for ligaments and joint capsule
• attached to adjacent plantar plates by the deep transverse metatarsal ligament
• sometimes a sesamoid is invested in the plantar plate
Plantar plate and deep transverse metatarsal ligaments from a segmental ‘tie-bar’ across the forefoot