Motions
Proximal Articular Surfaces
Distal Articular
Surfaces
Introduction Information
Proximal and Distal
Tibiofibular Joint
100
Name the three motions of ankle/foot complex
Dorsiflexion/Plantarflexion Inversion/Eversion Abduction/Adduction
100
What is a "mortise"?!
The structure of the distal and the lateral malleoli Example: the gripping part of a wrench which can be fixed (when gripping a bolt) or adjustable (an adjustable wrench head allows for use on many sizes of bolts)
100
Forms Distal Articulation of Ankle Joint
What is the body of the TALUS
100
What is the specific joint that "Ankle" refers to?
Talocrural Joint
100
What am I defining when JSF describes "A plane synovial joint formed by the articular head of the fibula with the posteriolateral aspect of the tibia"? a)proximal tibiofibular joint b)distal tibiofibular joint c) Mickey Mouse
a) proximal tibiofibular joint
200
Name the plane in which each of the primary motions occur?
Dorsiflexion/Plantarflexion- Saggital Inversion/Eversion- Frontal Plane Abduction/Adduction- Transverse plane
200
What type of mortise is an ankle joint ( adjustable or fixed) why?
The ankle mortise is adjustable which combines stability and mobility functions in order to allow for control through a large ROM
200
Name the three articular surfaces of the body of the Talus
1) Lateral (fibular) Facet --LARGE 2) Medial (tibial) Facet---SMALLER 3) Superior Trochlear Facet
200
What other structure is analogous to the Ankle Joint?
The Wrist
200
Name the Ligaments that surrond the proximal tibiofibular joint. Hint: Think of names that are comprised of locational cues
Anterior and Posterior Tibiofibular ligaments
300
What are the two types of motion patterns that occur not in the cardinal planes?
Pronation (coupled motion of dorsiflexion,eversion,abduction)/ Supination (coupled motion of plantarflexion, inversion and adduction) Valgus and Varus-can occur at many structures in the foot/ankle complex. A common one is Calcaeovalgus and Calcaneovarus
300
Name the two anatomically distinct joints from the ankle joint which whoose purpose is to allow the talus to move within the ankle mortise
The Proximal Tibiofibular Joint The Distal Tibiofibular Joint
300
Importance of Ligaments (Extremly brief REALLY dont think too hard!)
Provides structural integrity of ankle joint throughout ROM
300
What are the two purposes of the Ankle/foot complex?
1) Providing a Stable base during varing weight-bearing postures (without excessive muscular activity or energy expended) 2) Act as a rigid lever for push-off in gait
300
Define or describe the Distal tibiofibular joint
a Syndesmosis or fibrous union of the concave facet of the tibia and the convex facet of the fibula
400
Demonstrate the 3 primary motions of the ankle joint
Dorsiflexion-decrease angle of dorsal side of foot and tibia Plantarflexion-increase angle of dorsal side of foot and tibia Inversion- plantar surface angled toward midline Eversion- plantar surface angled away from midline ABduction- distal aspect moves away from midline ADduction-distal aspect moves toward midline
400
Would fusion of the tibiofibular joints affect motion of the ankle?
Yes because it would inhibit the motion of the talus in the ankle mortise
400
Where is the central groove of talus?
On the convex surface of the trochlear facet and is oriented at a slight angle to the head and neck of the Talus
400
What is the number of bones in the ankle joint?
28
400
Name the membrane (1) and ligaments (2) that help support the distal tibiofibular joint
Interosseous Membrane Anterior and Posterior tibiofibular ligaments
500
Why is dorsal flexion referred to as extension and plantarflexion referred to as flexion?
The top of the foot and anterior surface of the leg are embryological dorsal surfaces we refer to the dorsalflexion as extension Plantar flexion is thus referred to as the flexion of the ankle All of this is confusing and made simplier by the terminology of "dorsiflexion and plantarflexion" thus showing the importance of appropriate terminology usage.
500
Name the three facets that form the proximal segment of the ankle into a near continuous concave joint surface which extends more distally on the fibular(lateral) side than on tibial (medial) side.
Concave surfaces of: 1) distal tibia 2) Tibial (medial) malleoli 3) Fibular (lateral) malleoli
500
The articular cartiledge of the trochlear is continous with_________ Hint: Think about the anatomical articulating surfaces that compose the body of the talus
the cartiledge that covers the medial and lateral facets
500
Name the three functional segments of the foot
1)Hindfoot-posterior segment composed of calcaneus and talus 2)Midfoot-middle segment composed of navicular, cuboid and three cuneiform bones 3)Forefoot-anterior segment composed of metatarsals and phalanges
500
How is the function of the talocrural joint related to the stability of the tibiofibular mortise?
Tibia and Fibula wouldnt be able to grip the talus if the tibia and fibia were either seperated or the mortise was missing completely. Proximal tibiofibular joint must be mobile which allows for mobility at the distal tibiofibular joint since they are anatomically linked
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