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Topographical anatomy of the
lower limb, gait mechanismPh.D., Dr. Dávid Lendvai
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Anatomical aspects Clinical / practical aspects
Descriptive Topographic
Osteology, Syndesmology,Arthrology,Myology
Angiology
Neurology
Gluteal region~ subinguinalis~ ant. femoral
Femoral Triagon~ ~ posterior~ genus anterior~ ~ posterior~ cruralis anterior~ ~ posterior~ malleolaris medialis~ malleolaris lateralis~ retromalleolaris medialis~ retromalleolaris lateralis~ calcanea~ plantaris pedis~ dorsalis pedis~ digitorum pedis
Diseases and injuries(Symptoms, Syndroms, Diagnostics,Intervention planning and intervention )
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Ventral regions
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Foot shapes
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Epifascial structures
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Dermatomes, cutaneous nerves
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Femoral triangle
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Subinguinalis hiatus
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Ant. femoral region
Adductorian canal
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Femoral artery
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Arteries
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Ant. and med. crural regions
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Cutaneous nerves, palpation
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Nerves and blood vessels
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Arteries
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Dorsal regions
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podogram
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Epifascial Structures
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Dermatomes, cutaneous nerves
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Gluteal region
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Gluteal region
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Greater and lesser sciatic foramen
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Blood vessels and nerves
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IM injection
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Ischio-anal fossa
Pudendal canal (Alcock’s canal)
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Pudendal canal
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Pudendal region
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Post. femoral region
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Popliteal region
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Popliteal fossa
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Arteries
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Post. crural region
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Compartments
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Blood supply
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Tarsal canal
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Arteries
Most important pulse artery called ATP in clinics.
Palpating: behind the medial Malleolus
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Plantar region
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Plantar region
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Clinical aspects
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Dislocation
(Luxation)
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Osteoporosis, fracture
pregnancy, substitution of Ca++!!!
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Coxarthrosis, hip replacement
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Venous drenaige
Venous reflux conditioned by:1. Anastomosis between e.g. skin- and deepVeins (Perforanting)2. Musclepumps3. Valves
Perforating (e.g.):1. Dodd2. Hunter3. Boyd4. Sherman5. Cocket
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Veins
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Varicosity
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Lymphatic vessels
Deep (for Muscles, Tendons and Joints) and superficial (for subcutaneous tissues and skin) Lymphatic vessels
Below the knee: dorsolateraler and ventromedialer flowTo the sup. and deep popliteal lymphnodes
Above the knee: dorsolateraler, dorsomedialer and ventro-medialer flowto the sup. and deep inguinal lymphnodes
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Lymphatic flow
Characteristic T-shape of the inguinal lymph nodes:
Tractus horizontalis (drenaige from the outer genitals, perineum, anal part of the rectum, lower part of the rectus sheet , abdominal wall below the navel!!!)
Tractus verticalis (beside the rectus sheet and the outer genitals: lower limb)
By adults 1,5-2 cm large lymph nodes
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Lymphatic flow
Extreme Lymphoedema:Elephantiasis
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Compartment syndrome
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Deep venomous thrombosis
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Stenosis, diabetes
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Innervation
Dermatoms
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Innervation
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Walking: ca. 5 million years ago
…
Gait mechanism
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The mechanism of walking
Walk Run
Human: bipederQuadrupets: quadrupeder a) amble
b) cloister
Average walking speed: ~5 km/h = 1,4 m/s
Embrional and learned elements must work automatically togetherSyncro of the ipsi- and kontralateral movements through the contractionthe corresponding muscle groups::
Autochtone mucles of the backMuscles of the upper and lower limbs
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The mechanism of walking
Walking glides in cycles (gait cycle), which can be divided into phases.
A gait cycle means the repetitive sections of walking.
Phases of the gait cycle: Stance and Swing.
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Stance phase (about 60% of the gait cycle) is divided into:
1. Weight transfer: from first contact to lifting the other leg
2. Medium stance phase: from standing on the whole foot to raising the heel
3. End phase: the other leg touches the ground
Standing leg: yellow
The mechanism of walking
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The mechanism of walking
Swing phase (about 40% of the gait cycle) is divided into:
1. Start of swing: the swing leg passes the leg
2. Mid swing (mid swing): the lower leg is vertical above the ground
3. Final swing: lasts until the heel is put on
Walking leg: yellow
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The mechanism of walking
Phase of double support: both legs are on the floor
(Overlap between stance and swing phase)
ca. 10% of the walking cycle
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The mechanism of walking
Muscle and joint activities while walking:
Standing leg:
extension (hip and knee), plantar flexion in the upper ankle joint (flexor hallucis longus muscle)
Swing leg:
Anteflexion in hip and flexion in the knee joint;
at the end dorsiflexion of the upper ankle joint (tibialis anterior muscle)
Upper ankle joint is now stabilized by the geometry of the trochlea tali.
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The mechanism of walking
further events:
1. The lumbar lordosis is strengthened (assisting the hip flexion)
2. Weight transfer from the side of the walking leg to the supporting
leg (M. gluteus medius and minimus see „waddle gear")
3. Upper extremities make an opposite pendulum motion
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