Ankle Joint Biomechanics: A Comprehensive Analysis

Posted on Feb 16, 2025 in Human Biology

Complex Periastragalino

a. Tibioastragalina – Subastragalina – Mediotarsiana

A. Tibioastragalina (Trocleartrosis)

Astragalus: Trochlea astragalina int and ext lateral and veneers, unique art surface covered by hyaline cartilg

Distal Epiphysis of the Tibia and Fibula

Lig of tobillo -> int and ext lateral lig

Ext: Investment and resist the rotation int -> Lig peroneal astragalino ant (tobillo plans stabilized A / P 10 20 ° plantar flex) fibular lig calcaneo (stabilized Varo of joints) and fibular lig astrag previous

Internal Lat: eversión and resist the rotation ext. Tibioescafoideo l, and no tibioastraalino post lig tibiocalcaneo

ART SUBASTRAGALINA (artrodia)

Astragalus: Post concave surface, surface anteroinf (head and neck)

CAlcaneo: Surface largest convex anterior surface

Estabilizadores pasivos:

  • ligamental astragalus – calcaneo off. ligamental
  • astragalus — calcaneo post. ligamental
  • Cervical
  • ligamental interosseous

Art Mediotarsiana

Articulation astragalus, scaphoid calcáneo-Type = artrodia

Articulation calcáneo-cuboideaType = enartrosis
Estabilizadores pasivos
  • ligamental calcáneo scaphoid-planting.
  • ligamental scaphoid-top talus. ligamental
  • in “Y” of Chopart:
    • Fascículo calcáneo scaphoid ext. Fascículo calcáneo cuboideo-int. Ligamental
    • calcáneo cuboideo planting


TIBIOTARSIANA

OSTEOKIN: dorsiflexion 10 20 and plantiflexion 40th

ARTROKIN:

Dorsiflexión: Deslizamiento I dial into talus and posterior fibula is mueve hacia arriba. The axis of dorsiflexion is oblicua and passes the tip of the 2 maleolos.

Plantiflexión: Deslizamiento above and installed onto the talus. fibula is mueve downhill

  • The talus rotates inside the shroud not tibioperonea, but is more stable than in bending dorsiflexión already planted more than its previous border width.
  • The sections of the interosseous membrane or the ligaments that unite them distally to the tibia with the fibula modify the distribution of the pressures and produce a surcharge of the tibioastragalina joints.
  • The Lateral Stability is due to the docking between the 2 articular surfaces so while both the 2 maleolos are found intactos, the joints will be stable in this tibioastragalina plano.
  • Stability in an anteroposterior playing a major role the edge or back of the tibial malleolus called back.
  • Has been lost by a demonstrated fracture and subsequent rise in the later half of the bead causes decreases of 35% of articular contact

ART SUBASTRAGALINA

OSTEOKIN: 40 ° inversion and eversion 20 °

ARTROKIN:

investments: slip of the medial arch calcaneo

eversion: lateral slip arc calcaneo

ART MEDIOTARSIANA

OSTEOKIN: pronation and SUPINATION

MUSCAT ANT: ant tibial, extensive dedo, dedo ext long Gordo, 3rd peroneal

SIDE: short and long peroneal

POST: gastrocnemium, planting alone POPLITEO, flex along Gordo dedo, dedo.

BIOMEC OF TOBILLO

OSTEOKINEMATICA a) bending b) Extension

ARTROKINEMATICAMENTE: The astragalus is slip on the shroud. a)In bends: it slip back into b) stretch: will slip into before.

TIBI Fibula — ASTRAGALINA troclear: On the edges is formed distal fibula TIBIAL AND THAT YOU GET Forman A mortise THE BODY OF talus.