Quiz 2 Review Flashcards
Tibia
-Shin bone
-Primary weight bearing bone of the leg (recall ‘leg’)
Fibula
-Carries ~1/6th body weight (previously thought to be non-weight bearing)
Fibula (Anterior View)
-Apex
-Head
-Neck
-Shaft
-Interosseous border
-lateral malleolus
Lateral Malleolus
Lateral projection of your ankle
Tibia (Anterior View)
- Lateral Condyle
-Intercondylar Eminence
-Medial Condyle
-Medial and lateral condyles articulate with the femoral condyles
-Shaft
-Interosseous border
-Medial Malleolus
Gerdy’s Tubricle (Lateral Tibial Tubercle)
Large prominence lateral and superior to the tibial tuberosity
Tibia (Posterior View)
-Lateral Condyle
-Intercondylar Eminence
-Medial Condyle
-Shaft
-Interosseous Border (lateral border)
-Medial Malleolus
-Soleal Line
Proximal Tibiofibular Joint
Head of fibula articulates with the lateral condyle of the tibia
-Flat oval/circular facet on the fibular head which articulates with a similar facet on the tibia
-Synovial
-Plane
Proximal Tibiofibular Joint Movements (Dorsiflexion)
Limited superior and posterior glide
Proximal Tibiofibular Joint Movements (Plantar Flexion)
Limited inferior and anterior glide
Distal Tibiofibular Joint
-Distal end of fibula articulates with the distal end of the tibia
-Fibrous
Interosseous Membrane
Strong connective tissue between the tibia and the fibula which thickens at the distal end
Talocrural Joint
-Distal end of the tibia and fibula articulate with the trochlea (body) of the talus
-Synovial
-Hinge
Talocrural Joint Movements
Only dorsiflexion and plantar flexion
Deltoid Ligament
Four Ligaments (anterior tibiotalar, tibionavicular, tibiocalcaneal, posterior tibiotalar)
-Checks: Eversion of the ankle
-Very strong ligament and focused attachment point on the medial malleolus can lead to an avulsion fracture
Anterior Fibres of the Deltoid Ligament
Eversion with Plantar Flexion
Posterior Fibres of the Deltoid Ligament
Eversion with Dorsiflexion
Vertical Fibres
Eversion in Neutral
ATFL Movement
Inversion with Plantar Flexion
Calcaneofibular of the Deltoid Ligament Action
Inversion in Neutral
Anterior Talofibular Ligament (ATFL)
-Checks/Restricts: Inversion
-Palpated through sinus tarsi
-Most commonly injured ligament in the foot
Calcaneofibular Ligament
Checks: Inversion
Subcutaneous Calcaneal
Between the achilles tendon and the overlying skin
Subtendinous Calcaneal
Between the achilles tendon and the calcaneus
Subtalar Joint
-Inferior aspect of the talus articulates with the superior calcaneus
-Synovial
-Plane
Subtalar Joint Movements
-Inversion
-Eversion
Talocalcaneonavicular Joint
-Articulation between talus calcaneus and navicular joint
-synovial
-ball and socket
-helps increase inversion/eversion range
Calcaneofibular Ligament
Attaches: Lateral Malleolus - Lateral Calcaneus
Checks: Inversion
Subcutaneous Calcaneal
Between Achilles Tendon and the overlying skin
Subtendinous
Between Achilles Tendon and the Calcaneus
Subtalar Joint
Inferior aspect Talus articulates with superior Calcaneus
-Synovial
-Plane
Movements: Inversion - Eversion
Talocalcaneonavicular Joint
Articulation between: Talus, Calcaneus, Navicular
-Synovial
-Ball and Socket
-Increase inversion/eversion range
Plantar Calcaneonavicular (Spring Ligament)
-Helps maintain medial longitudinal arch by supporting head of talus
-If ligament is stretched, head of Talus can sink resulting in Pes Planus (flat foot)
Flat Foot
Pes Planus
High Arch
Pes Cavus
Calcaneocuboid Joint
-Articulation between Calcaneus and Cuboid
-Synovial
-Plane
Long Plantar Ligament
-Helps maintain arches in foot
Transverse Tarsal joint (Midtarsal Joint)
Movements: Inversion, Eversion
-Helps increase inversion/eversion range by allowing abduction and adduction of the forefoot
Talocalcaneonavicular Joint & Calcaneocuboid Joint are sometimes referred to as
Midtarsal joint
Intertarsal, Tarsometatarsal & Intermetatarsal Joints
-Synovial
-Plane
-Little movement at 2nd tarsometatarsal joint
Movements:
-Limited due to tight binding by the ligaments
-Bases of the 2nd through 5th metatarsals are firmly bound by ligaments
The Metatarsophalangeal Joints
-Head of metatarsals articulate with the bases of the proximal phlalanges
-Synovial
-Condyloid
Movements: flexion, extension, abduction, adduction, circumduction
Supporting Ligaments:
-Collateral ligaments on either side of the joints
-Plantar surface of joint capsules are thickened to form the plantar plates
Interphalangeal Joints
-Head of phalanx articulates with the base of the phalanx distal to it
-Synovial
-Hinge
Movements: flexion, extension
Supporting Ligaments: Collateral ligaments
Arches of the foot
-Bones of the foot form arches which act as shock absorbers
What are the arches of the foot?
- Medial longitudinal arch
- Lateral longitudinal arch
- Transverse arch
Arches are maintained by
- Shape of the interlocking bones
- Ligaments
- Fascia
- Action of the muscles
Medial Longitudinal Arch
Bones: Calcaneus, talus, navicular, 3 cuniforms, metatarsals 1-3
-Arch does not normally come in contact with the ground
-More involved in propulsion than weight bearing
Lateral Longitudinal Arch
Bones: Calcaneus, cuboid, metatarsals 4,5
-More invoved in weight bearing than propulsion
Transverse Arch
-Involves whole length of foot
Anterior Portion: Head of 1st MT to head of 5thMT
Middle Portion: Cuneiform #1 to Cuboid
Posterior Portion: Navicular to Cuboid
Plantar Fascia (Plantar Aponeurosis)
-Thick, central fascia on sole of foot
Attaches: Medial Calcaneal Tubricle - Proximal Phalanx of each toe
-Continuous with fascia of the calf
Windlass Mechanism
-As toes extend the plantar fascia tightens
-It pulls calcaneus anteriorly and elevates the arches putting the foot into supination
-Occurs whether the acton is active, passive, weight bearing or non-weight bearing
During windlass mechanism why does plantar fascia tighten when toes extend?
Because it crosses the MTPs
Femur
Longest/heaviest bone in the human body
Greater Trochanter
Bony prominence located on the anterolateral surface of the proximal shaft of femur, distal to femoral neck
Shaft
-Rough triangular in cross-sectional shape
-Descends in a slight medial direction
Lateral Epicondyle
Bony projection on the lateral side of the distal femur
Lateral Condyle
Part of the expanded lower condyle of the femur
Patellar Surface (aka. trochlear groove)
Anterior portion of the femurs articular surface that covers both the medial and lateral condyles
Medial Condyle
Medially located, round, articular eminence found on the proximal end of the tibia
Medial Epicondyle
Most prominent point on the medial condyle
Adductor Tubercle
A bony protrusion located at the peak of the medial condyle of the femur
Intertrochanteric line
A line upon the anterior aspect of the proximal end of the femur, extending between the lesser trochanter and the greater trochanter
Lesser Trochanter
A compact conical bony prominence positioned at the junction of the posterioinferior region of the femoral neck and shaft
Neck (of femur)
Connects the femoral shaft with the femoral head
Fovea
Roughened pit-like depression located below and lateral to the central region of the femoral head
Head (of femur)
Faces medially, superiorly, anteriorly and articulates with the acetabulum of the pelvis
Intertrochanteric crest
The ridge on the posterior aspect of the proximal end of the femur
Gluteal Tuberosity
broad, rough margin located along the upper postereolateral aspect of the body of femur
Linea Aspera
Longitudinally oriented rough ridge with 2 lips (medial and lateral) on the posterior surface of the femur
Intercondylar Notch (aka.intercondylar fossa)
Groove at distal end of femur
Popliteal Fossa
Diamond-shaped space behind the knee joint
Body (of femur)
Long part of femur
Popliteus Attachments
Inferior/distal attachment: Posterior proximal surface of the tibia, superior to the soleal line
Popliteus Actions
Action: Flexion of the knee (very weak)
Action: Medial rotation of the knee (key)
Screw Home Mechanism of the knee
When knee is fully extended, the tibia rotates laterally which locks the knee into a more stable position
What is the “Key to the Knee”?
Popliteus
-To flex the knee, the popliteus medially rotates the tibia to “unlock” the knee and allow it to flex
-Popliteus unlocks the screw home mechanism
The tibia, fibula, interosseous membrane and the intermuscular septa divide the leg into 4 compartments which are?
- Anterior Compartment
- Lateral Compartment
- Superficial Posterior Compartment
- Deep Posterior Compartment
*Muscles in a compartment share the same general function, nerve supply and blood supply
*Tibialis Anterior Attachments
Inferior/Distal attachment: base of the 1st MT, 1st (medial) cuneiform (plantar surface)
*Tibialis Anterior Actions
Action: Dorsiflexion
Action: Inversion
Extensor Hallucis Longus (EHL) Attachments
Inferior/Distal Attachment: base of the distal phalanx of the 1st. toe (dorsal surface)
Extensor Hallucis Longus (EHL) Actions
Action: extension of MTP, IP of 1st digit (Extension of big toe)
Action: assists in dorsiflexion, inversion
Hallucis Hallux
The great toe
Extensor Digitorum Longus (EDL) Attachments
Inferior/Distal attachment: Middle and distal phalanges of lateral 4 toes (dorsal surface)
Extensor Digitorum Longus (EDL) (Actions)
Action: Dorsiflexion
Action: Eversion
Action: Extension of MTPs, PIPs, DIPs 2nd-5th digits
What muscle in anterior compartment does not everyone have?
Peroneus Tertius
Peroneus Tertius Attachments
Inferior/Distal Attachment: base of the 5th MT (dorsal surface)
Peroneus Tertius Actions
Actions: Dorsiflexion (weak)
Actions: Eversion (weak)
Retinacula
Prevent the tendons from bowing as the muscles contract
Where there is a possibility of friction between the tendons and the retinacula, there is a ___________ which surrounds the tendon.
Tendon sheath
There is a ________________ outer layer for structure and protection with a ___________________ or lubrication.
Connective tissue, synovial inner layer
Peroneus Longus (aka. fibularis longus)
-Passes through the tunnel formed by the extensions of the long plantar ligament
-Forms stirrup with tibialis anterior at the base of the 1st MT
Peroneus Longus (aka. fibularis longus) Attachments
Inferior/Distal attachment: base of the 1st MT, 1st (medial) cuneiform (plantar surface)
Peroneus Longus (aka. fibularis longus) Actions
Action: Plantar Flexion
Action: Eversion
Peroneus Brevis
-Both tendons pass behind lateral malleolus
-Note the peroneal retinacula and the associated tendon sheaths
Peroneus Brevis Attachments
Inferior/Distal Attachment: Tuberosity of the 5th MT
Peroneus Brevis Actions
Actions: Plantar Flexion
Actions: Eversion
Gastrocnemius Attachments
Superior/Proximal Attachment: 2 heads attaching to the medial and lateral femoral condyles
Inferior/Distal Attachment: Calcaneus (via the achilles tendon)
Gastrocnemius Actions
Action: Plantar Flexion
Action: Knee Flexion (weak)
Gastronemius and soleus together are often called the ____________.
Triceps Surae
Soleus Attachments
Superior/Proximal attachment: Proximal posterior fibula, soleal line (tibia), Middle 1/3rd of medial border of tibia
Inferior/Distal attachment: Calcaneous (via the achilles tendon)
Soleus Action
Action: Plantar Flexion
Plantaris
Weak Muscle but if it ruptures (often with injury to the achilles), there can be significant pain
Plantaris Attachment
Superior/Proximal Attachment: distal lateral supracondylar ridge of the femur
Inferior/Distal Attachment: Calcaneous (NOT via the achilles tendon)
Plantaris Actions
Action: Plantar Flexion (weak)
Action: Knee Extension (weak)
Gastronemius & Soleus, share a common distal tendon called the ______________ which attaches to calcaneus.
Achilles Tendon
Fascia on calf is continuous with the ______________.
Plantar aponeurosis
Interosseous border
Where the interosseous membrane of the leg connects the shafts of the tibia and fibula together
Soleal Line
A prominent ridge on the posterior surface of the tibia
Intercondylar Emminence
The elevated bony region located at the center of the intercondylar area, on the superior surface of the upper end of the tibia
What is the rough ridge with medial and lateral lips, that goes down posterior side of femur?
Linea Aspera
Anterior Talofibular (Motion it Restricts)
Inversion/Plantar Flexion
Posterior Fibres of the Deltoid (Motion it Restricts)
Eversion/Dorsiflexion
Calcaneofibular (Motion it Restricts)
Inversion in Neutral
Anterior Fibres of the Deltoid (Motion it Restricts)
Eversion/Plantarflexion
What type of Joint is Subtalar?
Plane
What type of Joint is Talocrural?
Hinge
What type of Joint is Metatarsophalangeal?
Condyloid
What type of Joint is Talocalcaneonavicular?
Ball and Socket
What type of Joint is Interphalangeal?
Hinge
Sheath of Connective Tissue
Aponerosis
Bursa of Heel (Between Achilles Tendon and overlying skin)
Subcutaneous Calcaneal
What muscle is the key to the Knee?
Popliteus