Gross 2 Femoral Region *Muscles, Nerves and Actions Flashcards
What are the attachments of the Pectinous?
Proximal: Superior ramus of pubis
Distal: Pectineal line of femur, just inferior to lesser trochanter
What nerve innervates the Pectinous?
Femoral Nerve
What are the actions of the Pectinous?
Adducts and flexed thigh; assists with medial (internal) rotation of thigh
What are the attachments for Psoas Major?
Proximal: Sides of T12-L5 vertebrae and discs between them; transverse processes of all lumbar vertebrae
Distal: Lesser trochanter of femur
What nerve innervates the Psoas Major?
Anterior rami of lumbar nerves
What is the action of the Psoas Major?
Act conjointly in flexing thigh at hip joint and in stabilizing this joint
What are the attachments of Psoas Minor?
Proximal: Sides of T12-L1 vertebrae and intervertebral disc
Distal: Pectineal line and iliopubic eminence via iliopectineal arch
What nerve innervates Psoas Minor?
Anterior Rami of lumbar nerves
What are the action of the Psoas Minor?
Act conjointly in flexing thigh at hip joint and in stabilizing this joint
What are the attachments of Iliacus?
Proximal: Iliac crest, iliac fossa, ala of sacrum, and anterior sacro-iliac ligaments
Distal: Tendon of psoas major, lesser trochanter, and the femur distal to it
What nerve innervates Iliacus?
Femoral Nerve
What is the action of the Iliacus?
Act conjointly in flexing thigh at hip joint and in stabilizing this joint
What are the attachments of Sartorius?
Proximal: Anterior superior Iliac spine (ASIS) and superior part of notch inferior to it
Distal: Superior part of medial surface of tibia
What nerve innervates the Sartorius?
Femoral Nerve
What is the action of the Sartorius?
Flexes, Abducts, and laterally rotates thigh at hip joint; flexes leg at knee joint (Medially rotating leg when knee is flexed)
What are the attachments for Rectus Femoris?
Proximal: Anterior Inferior iliac spine (AIIS) and ilium superior to acetabulum
Distal: (Book goes really in depth) Direct attachment to Quadriceps tendon {base of the patella}, indirect attachment to Patellar ligament to tibial tuberosity
What nerve innervates the Rectus Femoris?
Femoral Nerve (L2, L3, L4)
What is the action of the Rectus Femoris?
-Extend leg at knee joint
-Also steadies hip joint and helps iliopsoas flex thigh
What are the attachments for Vastus Lateralis?
Proximal: Greater trochanter and lateral lip of linea aspera of femur
Distal: Distal: (Book goes really in depth) Direct attachment to Quadriceps tendon {base of the patella}, indirect attachment to Patellar ligament to tibial tuberosity, Also attaches to tibia and patella via aponeuroses
What nerve innervates Vastus Lateralis?
Femoral Nerve (L2, L3, L4)
What is the action of Vastus Lateralis?
Extend leg at knee joint
What are the attachments of Vastus Medialis?
Proximal: Intertrochanteric line and medial lip of linea aspera of femur
Distal: (Book goes really in depth) Direct attachment to Quadriceps tendon {base of the patella}, indirect attachment to Patellar ligament to tibial tuberosity, Also attaches to tibia and patella via aponeuroses
What nerve innervates Vastus Medialis?
Femoral Nerve (L2, L3, L4)
What is the action of Vastus Medialis?
Extend leg at knee joint
What are the attachment for Vastus Intermedius?
Proximal: Anterior and Lateral surfaces of shaft of femur
Distal: (Book goes really in depth) Direct attachment to Quadriceps tendon {base of the patella}, indirect attachment to Patellar ligament to tibial tuberosity
What nerve innervates Vastus Intermedius?
Femoral Nerve (L2, L3, L4)
What is the action of Vastus Intermedius?
Extend leg at knee joint
What are the attachments for Adductor Longus?
Proximal: Body of pubis inferior to pubic crest
Distal: Middle third of linea aspera of femur
What nerve innervates Adductor Longus?
Obturator nerve and brach of anterior division
What is the action of Adductor Longus?
Adducts thigh
What are the attachments for Adductor Brevis?
Proximal: Body and inferior ramus of pubis
Distal: Pectineal line and proximal part of linea aspera of femur
What nerve innervates Adductor Brevis?
Obturator nerve and branch of anterior division
What is the action of Adductor Brevis?
Adducts thigh; and to some extent flexes it
What are the attachments for Adductor Magnus?
(ADDUCTOR PART)
Proximal: Inferior ramus of pubis and remus of ischium
Distal: Gluteal Tuberosity, linea aspera, and medial supracondylar line
What are the attachments for Adductor Magnus?
(HAMSTRING PART)
Proximal: Ischial tuberosity
Distal: Adductor tubercle of femur
What nerve innervates Adductor Magnus?
(Adductor and Hamstring part)
Adductor: Obturator nerve and branches of posterior division
Hamstring: Tibial part of Sciatic nerve
What is the action of Adductor Magnus?
Adducts thigh
Adductor part: Flexes thigh
Hamstring part: Extends thigh
What are the attachments of Gracilis?
Proximal: Body and inferior ramus of pubis
Distal: Superior part of medial surface of tibia
What nerve innervates Gracilis?
Obturator nerve
What is the action of Gracilis?
Adducts the thigh; flexes leg; helps rotate leg medially
What are the attachments for Obturator Externus?
Proximal: Margins of obturator foramen and obturator membrane
Distal: Trochanteric fossa of femur
What nerve innervates the Obturator Externus?
Obturator nerve
What is the action of Obturator Externus?
Laterally rotates thigh; steadies head of femur in acetabulum
What are the attachments of Semitendinosus?
Proximal: Ischial Tuberosity
Distal: Medial Surface of superior part of tibia
What nerve innervate Semitendinosus?
Tibial Division of Sciatic Nerve
What are the actions for Semitendinosus?
Extend the thigh; Flex leg and rotate it medially when knee is flexed, When thigh and leg are flexed, these muscles can extend trunk
What are the attachments for Semimembranosus?
Proximal: Ischial Tuberosity
Distal: Posterior part of medial condyle of tibia
What nerve innervates Semimembranosus?
Tibial Division of Sciatic Nerve
What are the actions for Semimembranosus?
Extend the thigh; Flex leg and rotate it medially when knee is flexed, When thigh and leg are flexed, these muscles can extend trunk
What are the attachments for Bicep Femoris?
Proximal: (Long Head) Ischial Tuberosity
(Short Head) Linea Aspera and lateral supracondylar line of femur
Distal: Lateral side of head of fibula. (tendon is split by LCL)
What nerve innervates Bicep Femoris?
(Long Head) Tibial division of Sciatic
(Short Head) Common fibular division of sciatic
What are the actions of Bicep Femoris?
Flexes leg and rotates it laterally when knee is flexed; extends thigh
