The Lower Limb Sevda LAFCI, MD.PhD.. The Lower Limb The bones of the lower limb form the inferior...
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Transcript of The Lower Limb Sevda LAFCI, MD.PhD.. The Lower Limb The bones of the lower limb form the inferior...
![Page 1: The Lower Limb Sevda LAFCI, MD.PhD.. The Lower Limb The bones of the lower limb form the inferior part of the appendicular skeleton the organ of locomotion.](https://reader035.fdocuments.in/reader035/viewer/2022062301/5697bfea1a28abf838cb7538/html5/thumbnails/1.jpg)
The Lower Limb
Sevda LAFCI, MD.PhD.
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The Lower Limb
• The bones of the lower limb form the inferior part of the appendicular skeleton
• the organ of locomotion• for bearing the weight of body
– stronger and heavier than the upper limb
• for maintaining equilibrium
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The Lower Limb
• 4 parts:– The pelvic girdle (coxae)– The thigh – The leg (crus)– The foot (pes)
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The Lower Limb
• The pelvic girdle:• formed by the hip bones (innominate bones-ossa coxae)• connection the skeleton of the lower limb to the
vertebral column
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The Lower Limb
• The thigh• the femur• connecting the hip and knee
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The Lower Limb
• The leg • the tibia and fibula• connecting the knee and ankle
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The Lower Limb
• The foot– distal part of the ankle– the tarsal bones, metatarsal bones, phalanges
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The Lower Limb
• 4 parts:– The pelvic girdle– The thigh– The leg – The foot
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The pelvic girdleHip
• the area from the iliac crest to the thigh • the region between the iliac crest and the greater
torachanter of the femur• formed by the innominate bones-ossa coxae
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The hip boneos coxae
• large and irregular shaped• consists of three bones in childhood:
– ilium– ischium– pubis
•fuse at 15-17 years•joined in adult
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The hip bonethe ilium
• forms the superior 2/3 of the hip bone• has ala (wing), is fan-shaped• its body representing the handle• iliac crest: superior margin of ilium
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The hip bonethe ilium
• iliac crest– internal lip (labium internum)– external lips (labium externum)
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The hip bonethe ilium
• iliac crest end posteriorly “posterior superior iliac spine” at the level of the fourth lumbar vertebra bilat.*
• iliac crest end anteriorly “anterior superior iliac spine– easily felt– visible
if you are not fatty
• *: it is important for lumbar puncture
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The hip bonethe ilium
• iliac crest can always be determined• Bilateral posterior superior iliac spina lies beneath a
skin dimple*• The line connecting the right-l eft skin dimple is at the
level of 2. sacral vertebra and the middle of the sacroiliac joint.
• *: skin dimples formed by the skin and underlying fascia attached to the PSIS
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The hip bonethe ilium
• Tubercle of the crest is located 5cm posterior to the anterior superior iliac spine
• ant. inf. iliac spine• post. inf. iliac spine difficult to identfy by palpation
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The hip bonethe ilium
• greater sciatic notch
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The hip bonethe ilium
• At the medial side– auricular surface for the sacroiliac joint
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The hip bonethe ischium
• it forms the posteroinferior part of hip• L-shaped• which passes inferiorly from the acetabulum• turns anteriorly to join the pubis
– body – ramus
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The hip bonethe ischium
• at the inferior end of the body– ischial tuberosity
» is covered by gluteus maximus muscle when the thigh is extended
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The hip bonethe ischium
• at the posterior part of the ischium– ischial spine (spina ischiadica)
» separates the » greater sciatic notch sup. » lesser sciatic notch inf.
L
G
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The hip bonethe ischium
• the greater sciatic notch – is converted “greater sciatic foramen” by the sacrospinous
ligament– pass the
» the priformis muscle» the vessels and nerves of gluteal region
G
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The hip bonethe ischium
• The lesser sciatic notch – is converted “lesser sciatic foramen” by the sacrospinous and
sacrotuberous ligament– contains:
» obtrator internus muscle» pudendal nerve» internal pudendal vessels
L
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The hip bonethe ischium
– ramus» extends medially from the body» joins the inf. ramus of the pubis» form “ischiopubic ramus”
which completes the obturator foramen
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The hip bonethe pubis
– forms anterior part of the hip bone– body, lies medially, joins body of the other ones– it’s called symphysis pubis (cartilaginous joint)– ramus (2)
» superior ramus passes superiolaterally to the acetabulum» inferior ramus passes posteriorly, inferiorly, laterallyto join ramus of ischiumto form half of the pubic arch (ischiopubic ramus)
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The hip bonethe pubis
– the anterior border of the body is thickened“pubic crest”– its lateral end, pubic tubercule**: main pubic attachment for the inguinal ligament-bony landmark
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The hip bonethe obturator foramen
– oval aperture– surrounded by the bodies and rami of the pubis and ischium– it lies inferomedial to the acetabulum
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The hip bonethe obturator foramen
– is nearly closed by the obturator membrane
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The hip bonethe acetabulum
– cup shape cavity– articulates with the head of femur– it’s names from Roman vinegar cup, it is called acetabulum– Until puberty the ilium, ischium and pubis are united by a “Y” shaped hyaline cartilage– At 15-17 years these bones fuse to form the hip bone (cartilage is replaced by bone)
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The Lower Limb
• 4 parts:– The pelvic girdle– The thigh– The leg – The foot
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The thighFemur
• thigh bone is femur– longest– strongest– heaviest bone
• articulates with acetabulum and tibia
Height ≈ 4xlength of femur
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The thighFemur
• body (shaft)• ends (extremities)
Proximal end:– head– neck– greater trochanter– lesser trochanter
medial aspectposterior aspect
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The thighFemur
• Distal end:– broadened– articulates with tibia and patella
medial aspectanterior aspect
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The thighFemur
• Proximal end:– head– neck– greater trochanter– lesser trochanter
medial aspectposterior aspect
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The thighFemur
• Proximal end:– Head
• forms about 2/3 of a sphere• to fit deeply into the acetabulum• sometimes palpable when the thigh is rotated laterally in thin male
medial aspectposterior aspect
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The thighFemur
• Proximal end:– head– neck– greater trochanter– lesser trochanter
posterior aspect
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The thighFemur
– neck• between head and body• to meet the bodyneck runs inferolaterallywith angle of 125˚• limited laterally greater trochanter
posterior aspect
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The thighFemur
– Intertrochanteric line• between greater and lessertrochanter (anteriorly)• is produced by the attachment of the iliofemoral ligament (massive lig.)
anterior aspect
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The thighFemur
– Intertrochanteric crest• unites greater and lessertrochanter, posteriorly
posterior aspect
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The thighFemur
• Proximal end:– head– neck– greater trochanter– lesser trochanter
posterior aspect
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The thighFemur
– greater trochanter• is large, rectangular projection from the junction of the neck and the body.
posterior aspect
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The thighFemur
– greater trochanter• is insertion for muscle of gluteal region• the most lateral point of the hip region
posterior aspect
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The thighFemur
– greater trochanter• can be easily palpated on
the lateral side of the thigh• the most lateral point of the hip region
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The thighFemur
• Proximal end:– head– neck– greater trochanter– lesser trochanter
posterior aspect
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The thighFemur
• lesser trochanter• is located in the posteromedial surface• at the inferior end ofthe intertorachanteric crest• in the angle between the neck and body of the femur
posterior aspect
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The thighFemur
• Body (shaft)• Linea aspera
• in the middle of its posteriorly• has medial and lateral lips• Diverge inferiorly to form the supracondylar lines• not palpable, covered with large muscle
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The thighFemur
Body (shaft)• Pectineal line
• runs from the lesser torachanter to the medial lip• tendon of the pectineal muscle inserts into it
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The thighFemur
• Distal end:
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The thighFemur
• Distal end:– Condyle, epicondyle– intercondylar notch– patellar surface– adductor tubercle
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The thighFemur
• Distal end:– broadened for articulation with tibia– 2 large “condyle” project posteriorly• are subcutaneous • easily palpable
– separated by a deep U-shaped“intercondylar notch”
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The thighFemur
• Distal end:– at the center of the each condyle is a prominent “epicondyle”– tibial and fibular collateral ligaments are attached to the epicondyles
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The thighFemur
• Distal end:– articular surfaces of condyle are confluent anteriorly – patellar surface
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The thighFemur
– each condyle is separated from the patellar surface by a slight groove • Patellar surface can be
palpated when the leg is flexed.
– Patella (kneecap)• slides during flexion
and extension of the leg
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The thighFemur
• The adductor tubercle– located in the medial
side
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The Lower Limb
• 4 parts:– The pelvic girdle– The thigh– The leg – The foot
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The Lower Limb
• The leg (crus)
• Between knee and ankle• tibia• fibula
» it is composed of strong oblique fibers
are connected by an “interosseous membrane”
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The Lower Limb
• Tibia (shine bone)• supports most of the weight• articulates with the condyle of femur superiorly and the talus inferiorly
• proximal end is large• superior surface of tibia almost flat • Medial-lateral condyles articulate with the condyle of femur
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The Lower Limb
• sup. surface is flat• consists of med-lat. tibial plateaus
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The Lower Limb
• lat. condyle has facet inferiorly for the head of fibula
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The Lower Limb
• Tibial tuberosity is located superior part of anterior surface– patellar ligament isattached to the tibial tuberosity
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The Lower Limb
• distal end of tibia is small• facet for the fibula and talus• project medially and inferiorly “medial malleolus”
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The Lower Limb
• “medial malleolus”• has facet for articulation with talus
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The Lower Limb
• body (corpus)• medial• lateral• posterior surface• medial• lateral (interosseous border)*• anterior border
anterior aspect
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The Lower Limb
• body (corpus)• *:lat. border is sharp • it gives attachment to the
“interosseous membrane” • uniting the tibia and fibula
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The Lower Limb
• At the posterior surface of tibia • observe a rough diagonal ridge knownas the “soleal line” (soleus muscle is attached)
posterior aspect
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The Lower Limb
• At the posterior surface of tibia • observe a rough diagonal ridge knownas the “soleal line” (soleus muscle is attached) • runs inferioromedially to the medial border
posterior aspect
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The Lower Limb
• At the posterior surface of tibia • Observe a rough diagonal ridge knownas the “soleal line” (soleus muscle is attached) • runs inferioromedially to the medial border• The nutritient foramen is located
posterior aspect
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The Lower Limb
• At the posterior surface of tibia • Observe a rough diagonal ridge knownas the “soleal line” (soleus muscle is attached) • runs inferioromedially to the medial border• The nutritient foramen is located
posterior aspect
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The Lower Limb
• Fibula (calf bone)• Pin-like bone• lies posterolateral to the tibia• little /no function in weight hearing• providing support for tibia• also provides stability to the ankle joint• mainly for the attachment of muscle
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The Lower Limb
• Fibula (calf bone)• neck is constricted• interosseous border for attacment to the interosseous memb.• nutricient foramen is usually present at the post. side• head of fibula is irregular
– he head of facet on its for articulation
with the lat. tibial condyle of tibia
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The Lower Limb
• on the distal end project medially and inferiorly forms “lateral malleolus”– lies more inferior and posterior than does medial malleolus
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The Lower Limb
• 4 parts:– The pelvic girdle– The thigh– The leg – The foot
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The Lower Limb
• The foot comprise the – tarsus– metatarsus– phalanges
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The Lower Limb
• The foot comprise the – tarsus– metatarsus– phalanges
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The Lower Limb
• tarsus• talus*• calcaneus • cuboid • navicular• 3 cuneiforms
*:articulates with the leg bones
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The Lower Limb
• talus• body-cuboidal shape• on the superior side it has “trochlea”it is pulley shaped part of talus• The inferior surface of the body of talus has an oval area for the articulation
with the calcaneus
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The Lower Limb
• talus• posterior part of body has posterior process
– has med-lat tubercle
• 2 tubercle to consist of the groove for the tendon of the flexor hallucis longus muscle
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The Lower Limb
• talushead of talus has articular surface for naviculare bone
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The Lower Limb
• talusat the medial side of the calcaneus shelf-like projection of calcaneus “Sustentaculum tali”
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The Lower Limb
• talusthe neck is slightly constrictedinferiorly there is a groove called the “sulcus tali” for the interosseous lig.
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• Largest-strongest
• 6 surfaces– Sup :joins talus
– Inf :calcaneal tuber
– Ant :joins cuboid
– Post :forms heel
– Lat :fibular trochlea
– Med :sustentaculum tali
Calcaneus
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• 3 facets– Ant cuneiform – Post talus– Lat cuboid – Med tuberosity of navicular
Navicular
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Cuboid
• Most lat. bone distal tarsus
• Ant base of metatarsals 4-5
• Post calcaneus
• Med lat cuneiform & navicular
• Inf groove for fibularis longus
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Cunieform
• Medial (largest)
• Lateral
• Intermedium (smallest)
• Ant base of metatarsals 1-4
• Post Navicular
Prof. Dr. H. Selçuk Sürücü
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Metatarsal
• 5 bones
• Base
• Head
• Body
• I shortest & thickest
• II longest
Prof. Dr. H. Selçuk Sürücü
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Digital
• 14 bones• Base• Head• Body• Proximal, middle & distal phalanges