Cuatro
Popliteus actions (2), origin (1), insertion (1)
Actions:
Flexes the knee
Medially rotates the leg (when the knee is flexed)
Origin: Lateral condyle of femur
Insertion: Posterior proximal tibial shaft
Origins:
Linea aspera (medial lip)
Intertrochanteric line
Vastus Medialis?
Hip joint: Thigh extension, thigh internal rotation, stabilizes pelvis. Knee joint: Leg flexion, leg internal rotation.
What is Semimembranosus and Semitendinosus?
Toni likes to call them the Semi Sisters.
Actions: Flexes knee
Medially rotates leg (when knee is flexed)
Extends hip
Posteriorly tilts pelvis
What is the Semimembranosus?
(which muscle) The “adductor hiatus” gap allows passage of
blood vessels.
Sometimes considered part of the hams group
as they share a common origin ischial tuberosity
What is adductor magnus?
Nickname:
tailor’s muscle
What is Sartoris?
Action: Extends knee
Origins: Linea aspera (lateral lip) &
Gluteal tuberosity
Insertion: Tibial tuberosity
What is the Vastus Lateralis?
•Only quadriceps muscle that crosses
2 joints (hip & knee)
What is rectus femoris?
Semimembranosus actions (4)
What is
Actions: Flexes knee,
Medially rotates leg (when knee is flexed)
Extends hip, Posteriorly tilts pelvis
Origins:
Ischial tuberosity (long head)
Linea aspera; lower lateral lip (short head)
What is the Biceps Femoris?
Can be regarded as extension of the psoas muscle.
What is Pectineus?
Tendinous intersection of 3 muscles:
•Sartorius
•Gracilis
•Semitendinosus
What is Pes Anserinus?
Vastus Intermedius action, origin, and insertion (1 each)
Action:
Extends knee
Origin:
Anterior lateral femoral shaft
Insertion:
Tibial tuberosity
Origins:
Linea aspera (lateral lip)
Gluteal tuberosity
What is vastus lateralis?
Bicep Femoris actions(4) and origins (2)
What are
Actions: Flexes knee, Extends the hip,
Laterally rotates leg (when knee is flexed),
Posteriorly tilts the pelvis
Origins:
Ischial tuberosity (long head)
Linea aspera; lower lateral lip (short head)
Insertion:
Fibular head
What is biceps femoris?
Actions:
Adducts the hip
Flexes the hip
Flexes the knee
Medially rotates the leg (when knee is flexed)
What is Gracilis?
This muscle sometimes will roll when going straight over it, and some people may find that uncomfortable.
What is the rectus femoris?
What is
Anterior inferior iliac spine (AIIS)
External ilium just superior to acetabulum
Action: Extends knee
Origin: Anterior lateral femoral shaft
Insertion: Tibial tuberosity
What is vastus intermedius?
Actions (4), Origins (1), Insertions (1) of Semimembranosus
Actions:
Flexes knee, Medially rotates leg (when knee is flexed), Extends hip, Posteriorly tilts pelvis
Origin: Ischial tuberosity
Insertion: Medial condyle of the tibia (posterior surface)
Most medial hamstring
Semitendinosus actions (4), origin (1) insertion (1)
What are the
Actions: Flexes knee, Medially rotates leg (when knee is flexed), Extends hip, Posteriorly tilts pelvis
Origin: Ischial tuberosity
Insertion: Medial proximal tibial shaft (at Pes Anserinus)
One of three muscles within the Pes Anserinus tendinous intersection group.
Adductor Brevis action (1), Origin (1), Insertion (1)
Action: Adducts the hip
Origin: Inferior pubic ramus
Insertion: Proximal 1/3 of the linea aspera (medial lip)
Sartorius (5) actions
Actions: Flexes hip, Laterally rotates hip,
Abducts hip, Flexes knee
Medially rotates the leg (when the knee is flexed)