Bones of lower limbs -...

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1Bone: Lower limb -

Bones of lower limbs

Including bones of pelvic girdle (hip bones) and lower limbcompared with upper limbno equivalent movements to pronation and supination in upper limb; more stable in lower limb, for weight-bearing

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Bony pelvis

Iliumischiumpubis

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Ilium (lateral surface) ant. sup. iliac spine:

a.s.i.s. post. sup. iliac spine:

p.s.i.s. Iliac crest: a.s.i.s. –

p.s.I.s. tubercle of crest ant. inf. iliac spine:

a.i.i.s. post. inf. iliac spine:

p.i.i.s. greater sciatic notch gluteal surface

Great sciatic notch

Obturator foramen

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Ilium (medial surface)-1

obturator forameniliac fossaa.s.i.s.; p.s.i.s. iliac crest: a.s.i.s. –

p.s.i.s.greater sciatic

notch (g.s.n.) Obturator foramen

g.s.n.

a.s.i.s.

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Ilium (medial surface)-2

ala (iliac fossa)Body of iliumridge between upper and lower part of iliacarcuate line

articular surface for sacrum (auricular face)attachment for ligaments (sacroiliac joint)iliac tuberosity

Obturator foramen

g.s.n.

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Ilium (medial surface)-3

arcuate line: linea terminalis of pelvic brimbelow: pelvic

part; lesser/true pelvisabove:

abdominal part; greater/false pelvis

Abdominal part

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Ischium

body of ischiumlesser sciatic notchischial tuberosityischial spineischial ramus: with inf.

ramus of pubis ischiopubic ramus

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Pubis: ramisup. ramus contribute to acetabuluminf. ramus join ischium (ischial ramus)

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Pubis:1

body of pubispubic crestpublic tuberclesup. pubic ramus:

pectineal line on its sup. border, continues into arcuate lineinf. pubic ramusobturator foramen

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Obturator canal

obturator canal: at the upper, posterior angle of obturator foramen (obturator n.,a.,v.)

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Iliopubic eminence

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Pubis: external

acetabulum: acetabular notch, limbusGluteal lineAnteriorPosteriorInferior

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Pubic symphysis

cartilaginous joint (fibrous cartilage)as a landmark of

pelvic cavity

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PelvisThe complete pelvis:the line (pelvic inlet)

from promontory of sacrum -- arcuate line - - pectineal line -- pubic crest separatesfalse pelvis and true

pelvissacrum + linea

terminalis + pubis symphysis

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Pelvis: anatomical position

a.s.i.s. and symphysis pubis on the same coronal plane

symphysis

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Pelvis: female vs. maleShape: circular in female (less distinct promontory,

broader alae); heart-shaped in maleAngle: larger in female; smaller in male

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Pelvis: pelvic outletbounded by symphysis pubis - ischiopubic rami - ischial

tuberosity - sacrotuberous lig. - coccyx

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Pelvic outletnot on the same plane; line joining the ischial tuberosities

of both sides divides it into two parts

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The sacro-iliac joint-1synovial joint in childhood; fibrous bands in joints of adult; > 50 years old, completely fibroussupported by many tough ligaments including: interosseous lig., ant.& post. sacroiliac lig., sacrospinous

lig. , sacrotuberous lig.

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Sacro-iliac joints-2

interosseous lig., ant. and post. sacroiliac lig.

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Sacroiliac joints and Sciatic foramensgreater sciatic foramen; lesser sciatic foramen*posterior aspect of joint heavily armed with

ligaments (to counter body weight)

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Sciatic foramen

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Sciatic foramen

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Femur: proximal end (anterior Surface)head: faces upward,

medially, slightly forward; fovea; neck:greater trochanter;

trochanteric fossa (obturator internus attachment) intertrochanteric line lesser trochanter

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Femur: angle of inclination

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Femur: proximal end (medial surface)

head; fovea; neck:greater trochanter;

trochanteric fossalesser trochanter:

(iliopsoas inserts here): on posterior aspect of femur;intertrochanteric crest:

posterior surfaceintertrochanteric line:

anterior surface

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Femur: proximal end (poeterior surface)head; fovea; neck:greater trochanterlesser trochanter:

(iliopsoas inserts here): on posterior aspect of femurintertrochanteric crest:

posterior surface

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Femur: shaft

gluteal tuberositylinea aspera (post.

surface)

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Femur: distal end-1medial epicondyle; adductor tubercle (adductor magnus m.)lateral epicondyle intercondylar notch (fossa): deep, posteriorly locatedarticular cartilage: tibial surface; patellar surface

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Femur: distal end-2medial condyleadductor tubercle

(adductor magnus m.)lateral condyle intercondylar notch

(fossa): deep, posteriorly locatedarticular cartilage: tibial

surface; patellar surface

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Tibia: proximal end-1medial condyle, lateral condyle; intercondylar area (intercondylar tubercles) for meniscus and lig.tibial tuberosity (tubercle): ligamentum patellae attachment

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Tibia: proximal end-2 intercondylar area (intercondylar tubercles): medial and lateral

attachment of cruciate lig. & horns of med. and lat. menisciarticular surface for head of fibula

post. surface

Med. Lateral

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Tibia: shaft

soleal line (oblique line): on upper 1/3 of post. surface

post. surface

Med. Lateral

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Tibia: shaft (cross-section)quadrangular in

cross sectionmed., lat., post.

surfacesant.

(subcutaneous); interosseous, posteromedial borders

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Tibia: distal end

medial malleolus: groove for tibialis posterior

(anterior view) (posterior view)

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Tibia: with Talusinferior articular facet

for talus (trochlea)

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Fibula: head

Surface anatomy of fibular headArticular surface

with tibiaapex of head

(styloid process) Common fibular nerve

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Fibula: distal end

lateral malleolusarticular facet for

talus

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Acetabulum

Acetabular fossaAcetabular notchArticular (lunate) surfaceLigaments

Transverse acetabular ligamentLigament of femroal headIliofemoral ligamentIschiofemoral ligamentPubofemoral ligament

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Transverse acetabular ligamenttransverse acetabular lig.: connecting the ant.& post.

ends of the articular cartilagevessels, n. to head run deep to this lig.

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Ligament of femoral head

lig. of the head of the femur: acetabular notch

fovea of the head of femursurrounded by

synovial sheath; conveys vessels in childhoodminimal effect for

strength

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Acetabulum: Ligaments-1

Iliofemoral lig.inverted Y; aiis, ilium

intertrochanteric linePubofemoral lig.Iliopubic eminence iliofemoral lig.

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Acetabulum: ligaments-2

Ischiofemoral lig.

ischium of

acetabulum rim med. aspect of

greater trochanter

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Knee Joint

Weight-bearing3 joint compartments:1) medial compartment:

medial condyle (femur) + tibia2) lateral compartment:

lateral condyle (femur) + tibia3) patella + femur

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Patella

ligamentum patellae (patellar lig.)Continuation of

quadriceps femoris tendon above to apex of patella, below to tibia tuberosity

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Tibio-femoral joint compartment

4 ligaments:1) medial (tibial)

collateral lig.2) lateral (fibular)

collateral lig.3) ant. cruciate lig.4) post. cruciate lig.

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Cruciate ligaments (anterior view)

ant. cruciate: ant. intercondylar area of tibia to lateral wall of intercondylar fossa of femurpost. intercondylar area

of tibia to medial wall of intercondylar fossa of femur(前外後內)

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Knee: cruciate liagaments interconnect femur and tibiaant. cruciate: ant.

intercondylar area of tibia to lateral wall of intercondylar fossa of femurpost. intercondylar area of

tibia to medial wall of intercondylar fossa of femur limitations of extreme

anterior and posterior displacements of tibia on fixed femur

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Knee: collateral ligaments

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Meniscus

Medial meniscus: fibrocartilage; wide- C shaped; periphery attaches to joint capsuleLateral meniscus:

more circular in shape

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Bones of the foot

Tarsal bonesMetatarsal bonesPhalanges (pl. of phalax)

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Tarsal bones: proximal rowProximal row: Talus, Calcaneus (Calcaneum), Navicular

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Talus-1Head: articulate with NavicularBodysuperior articular facet (trochlear)

tibiamedial facet: smaller, comma- shaped medial malleoluslateral facet: larger, triangular shape

lateral malleolus

Anterior Posterior

Medial view

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Talus-2

Inferior surface: divided by sulcus tali (for interosseous lig.) into ant. & post. partsanterior part: 2 smaller

facet Calcaneumposterior part: 1 large

facet Calcaneus (post. talocalcaneal joint)

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Talus-3 transfers body weight postero-inferiorly to calcaneum which relays it to ground antero-inferiorly to calcaneum and navicular, through which to distal

row of tarsus and metatarsus

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Calcaneus (Calcaneum)-1

heel of foot, transfer weight to groundTalar shelf (sustentaculum tali): projection on medial sidesuperior surface:posteriorly: large facet for post.

talocalcaneal jointmiddle and anterior facets for

talus (in front of sulcus calcanei)

ant. surface for Cuboidinsertion of calcaneal tendon (Achilles tendon)groove for tendon of flexor hallucis longus on its undersurface

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Calcaneus (Calcaneum)-2

calcaneal tuberosityant. surface for Cuboidinsertion of calcaneal

tendon (Achilles tendon)groove for tendon of

flexor hallucis longus on its undersurface

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Calcaneus-3

Calcaneal sulcusant. surface for Cuboidinsertion of calcaneal

tendon (Achilles tendon)

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Navicular bone

between head of talus and distal row of 3 cuneiform bonestuberosity:

attachment of Tibialis posterior

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Tarsal bones: distal row-1Distal row: Cuboid + 3 Cuneiform bones

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Cuboid

ant. surface: for 4th, 5th metatarsalsproximal: articulate

with calcaneummedial: with navicular

& lateral cuneiform

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Cuboid-2Lateral surface: tuberositygroove for fibularis (peroneus) longus tendon on underside

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Cuneiforms (Latin: wedge)

cuneiforms:med.Intermediatelat.medial: largestproximal: navicular bonedistal: metatarsus 1-3

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Metatarsus-1

all metatarsals in the same plane (different from hand)?

Base BodyHead (distal end)

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Metatarsus-2(deep) transverse

(inter)metatarsal lig. links heads (distal end) of metatarsals

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Phalanges

Big toe: proximal and distal phalanx2nd-5th toe:

proximal, middle, distal phalanx

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The arches of the foot: longitudinal archmedial view:ant.: head of metatarsals on the groundpost.: calcaneal tuberosity (tuber calcanei) on the ground

lateral view: lower longitudinal arch; apex at the ant. part of calcaneum

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The arches of the foot: transverse arch

obvious at the distal row of tarsal bones,cuboid (laterally) close to

ground; medially, medial cuneiform off the groundmovement (of foot at ankle):

dorsiflexion/plantar flexion; inversion/eversion

70Bone: Lower limb -