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Anat1 - Lower Limb

(Week 8)

QuestionAnswer
The three segments of the lower limb are the _______, _______, and _______. thigh, leg, foot
The sole bone of the thigh is the _______. femur
The _______ is the largest, strongest bone it he body. femur
The femur articulates proximally with the _______ and distally with the _______ and _______. acetabulum, tibia, fibula
The femur angles medially as it descends to the knee. This is called the _______ _______. Q angle
The _______ is the weakest part of the femur. neck
The _______ is the triangular sesamoid bone enclosed in the quadriceps tendon. patella
The patella articulates with the femur at _______ _______. femoral condyles
The patella protects the _______ _______ and improves leverage of _______. anterior knee, quadriceps
The three compartments of the thigh are: anterior, posterior, medial
The iliopsoas is a composite of which two muscles that share a common insertion tendon? iliacus, psoas
Iliacus O.I.A. O: iliac fossa and crest, lateral sacrum I: via common tendon to lesser trochanter of femur A: PM of thigh flexion
Psoas O.I.A. O: TBs, bodies, and discs of T12-L5 I: via common tendon to lesser trochanter of femur A: PM of thigh flexion
Tensor Fasciae Latae O.I.A. O: ASIS and anterior aspect of iliac crest I: anterolateral tibial condyle via iliotibial tract A: flex, abd of thigh (syn of iliopsoas, glut max, med & min), med rot of thigh, stabilizes knee
Sartorius O.I.A. O: ASIS I: medial proximal tibia (pes anserine) A: flexes, abducts, and laterally rotates thigh, flexes knee
Rectus Femoris O.I.A. O: AIIS I: tibial tuberosity via patellar ligament A: extends knee and flexes thigh at hip
Vastus Lateralis O.I.A. O: greater trochanter, intertrochanteric line, linea aspera I: tibial tiberosity via patellar ligament A: extends and stabilizes knee
Vastus Medialis O.I.A. O: linea aspera, intertrochanteric line I: tibial tuberosity via patellar ligament A: knee extension
Vastus Intermedius O.I.A. O: anterior & lateral proximal femur I: tibial tuberosity via patellar ligament A: knee extension
The four muscles of quadriceps femoris are: Rectus femoris, Vastus Lateralis, Vastus Medialis, Vastus Intermedius
Adductor Magnus O.I.A. O: ischial and pubic rami & ischial tuberosity I: linea aspera and adductor tubercule of femur A: anterior part adduction & medial rot of thigh; medial part synergist of hamstrings, thigh extension
Adductor Longus O.I.A. O: pubis I: linea aspera A: adduct, flex, & med rot thigh
Adductor Brecis O.I.A. O: pubis - body and inferior ramus I: linea aspera A: adduct & med rot thigh
Pectineus O.I.A. O: pectineal line of pubis I: line between lesser trochanter to linea aspera A: adduct, flex & med rot thigh
Gracillis O.I.A. O: pubis - body and inferior ramus I: pes anserine - proximal medial tibia A: adduct, felx & med rot thigh
Thigh extension and knee flexion are primarily affected by the _______ muscles. hamstring
Forceful extension is aided by the _______ _______ muscle. gluteus maximus
Gluteus Maximus O.I.A. O: posterior ilium, sacrum, coccyx I: gluteal tuberosity of femur and iliotibial tract A: major extensor of thigh, also abduction and lat rot
Gluteus Medius O.I.A. O: posterior lateral surface of ilium below crest I: greater trochanter of femur A: abduction and med rot of thigh, important in holding pelvis level while walking
Gluteus Minimus O.I.A. O: lateral ilium below Gluteus medius I: greater trochanter of femur A: abduction, med rot of thigh
The three hamstring muscles are: biceps femoris, semitendinosis, semimembranosus
Biceps Femoris (long and short head) O.I.A. O: ischial tuberosity (long head), linea aspera and distal femur (short head) I: via tendon to lat tibial condyle and head of fibula A: long: ext thigh, long and short: flex knee & lat rot, esp w/knee flexed
Semitendinosis O.I.A. O: ischial tiberosity w/ long head of biceps femoris I: medial aspect of upper tibial shaft A: extends thigh at hip, flex knee - med rot w/ knee flexed
Semimembranosus O.I.A. O: ischial tuberosity I: medial condyle of tibia A: extends thigh at hip, flex knee - med rot w/ knee flexed
Piriformis O.I.A. O: anterolateral surface of sacrum I: greater trochanter of femur A: rotates extended thigh laterally, stabilizes pelvis joint
Gemellus Superior & Inferior O.I.A. O: superior: ischial spine, inferior: ischial tuberosity I: greater trochanter of femur A: rotates extended thigh laterally, stabilizes pelvis/hip joint
Obturator Internus O.I.A. O: inner surface of obturator membrane and foramen & greater sciatic notch I: greater trochanter of femur A: rotates extended thigh laterally, stabilizes pelvis/hip joint
Obturator Externus O.I.A. O: outer surface of obturator membrane and foramen I: greater trochanter of femur A: rotates extended thigh laterally, stabilizes pelvis/hip joint
Quadratus Femoris O.I.A. O: ischial tuberosity I: greater trochanter of femur A: rotates thigh laterally, stabilizes pelvis/hip joint
Abduction and internal rotation of the thigh are affected by the _______ _______ and _______ _______, and are antagonized by the _______ rotators. gluteus medius, gluteus minimus, lateral
Thigh adduction is the role of which five adductor muscles? adductor magnus, adductor longus, adductor brevis, pectineus, and gracillis
Created by: sdouglass