Gross 2 Femoral Region *Muscles, Nerves and Actions

Question 1

What are the attachments of the Pectinous?

Answer 1

Proximal: Superior ramus of pubis

Distal: Pectineal line of femur, just inferior to lesser trochanter

Question 2

What nerve innervates the Pectinous?

Answer 2

Femoral Nerve

Question 3

What are the actions of the Pectinous?

Answer 3

Adducts and flexed thigh; assists with medial (internal) rotation of thigh

Question 4

What are the attachments for Psoas Major?

Answer 4

Proximal: Sides of T12-L5 vertebrae and discs between them; transverse processes of all lumbar vertebrae

Distal: Lesser trochanter of femur

Question 5

What nerve innervates the Psoas Major?

Answer 5

Anterior rami of lumbar nerves

Question 6

What is the action of the Psoas Major?

Answer 6

Act conjointly in flexing thigh at hip joint and in stabilizing this joint

Question 7

What are the attachments of Psoas Minor?

Answer 7

Proximal: Sides of T12-L1 vertebrae and intervertebral disc

Distal: Pectineal line and iliopubic eminence via iliopectineal arch

Question 8

What nerve innervates Psoas Minor?

Answer 8

Anterior Rami of lumbar nerves

Question 9

What are the action of the Psoas Minor?

Answer 9

Act conjointly in flexing thigh at hip joint and in stabilizing this joint

Question 10

What are the attachments of Iliacus?

Answer 10

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

Question 11

What nerve innervates Iliacus?

Answer 11

Femoral Nerve

Question 12

What is the action of the Iliacus?

Answer 12

Act conjointly in flexing thigh at hip joint and in stabilizing this joint

Question 13

What are the attachments of Sartorius?

Answer 13

Proximal: Anterior superior Iliac spine (ASIS) and superior part of notch inferior to it

Distal: Superior part of medial surface of tibia

Question 14

What nerve innervates the Sartorius?

Answer 14

Femoral Nerve

Question 15

What is the action of the Sartorius?

Answer 15

Flexes, Abducts, and laterally rotates thigh at hip joint; flexes leg at knee joint (Medially rotating leg when knee is flexed)

Question 16

What are the attachments for Rectus Femoris?

Answer 16

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

Question 17

What nerve innervates the Rectus Femoris?

Answer 17

Femoral Nerve (L2, L3, L4)

Question 18

What is the action of the Rectus Femoris?

Answer 18

-Extend leg at knee joint
-Also steadies hip joint and helps iliopsoas flex thigh

Question 19

What are the attachments for Vastus Lateralis?

Answer 19

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

Question 20

What nerve innervates Vastus Lateralis?

Answer 20

Femoral Nerve (L2, L3, L4)

Question 21

What is the action of Vastus Lateralis?

Answer 21

Extend leg at knee joint

Question 22

What are the attachments of Vastus Medialis?

Answer 22

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

Question 23

What nerve innervates Vastus Medialis?

Answer 23

Femoral Nerve (L2, L3, L4)

Question 24

What is the action of Vastus Medialis?

Answer 24

Extend leg at knee joint

Question 25

What are the attachment for Vastus Intermedius?

Answer 25

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

Question 26

What nerve innervates Vastus Intermedius?

Answer 26

Femoral Nerve (L2, L3, L4)

Question 27

What is the action of Vastus Intermedius?

Answer 27

Extend leg at knee joint

Question 28

What are the attachments for Adductor Longus?

Answer 28

Proximal: Body of pubis inferior to pubic crest Distal: Middle third of linea aspera of femur

Question 29

What nerve innervates Adductor Longus?

Answer 29

Obturator nerve and brach of anterior division

Question 30

What is the action of Adductor Longus?

Answer 30

Adducts thigh

Question 31

What are the attachments for Adductor Brevis?

Answer 31

Proximal: Body and inferior ramus of pubis Distal: Pectineal line and proximal part of linea aspera of femur

Question 32

What nerve innervates Adductor Brevis?

Answer 32

Obturator nerve and branch of anterior division

Question 33

What is the action of Adductor Brevis?

Answer 33

Adducts thigh; and to some extent flexes it

Question 34

What are the attachments for Adductor Magnus? (ADDUCTOR PART)

Answer 34

Proximal: Inferior ramus of pubis and remus of ischium Distal: Gluteal Tuberosity, linea aspera, and medial supracondylar line

Question 35

What are the attachments for Adductor Magnus? (HAMSTRING PART)

Answer 35

Proximal: Ischial tuberosity Distal: Adductor tubercle of femur

Question 36

What nerve innervates Adductor Magnus? (Adductor and Hamstring part)

Answer 36

Adductor: Obturator nerve and branches of posterior division Hamstring: Tibial part of Sciatic nerve

Question 37

What is the action of Adductor Magnus?

Answer 37

Adducts thigh Adductor part: Flexes thigh Hamstring part: Extends thigh

Question 38

What are the attachments of Gracilis?

Answer 38

Proximal: Body and inferior ramus of pubis Distal: Superior part of medial surface of tibia

Question 39

What nerve innervates Gracilis?

Answer 39

Obturator nerve

Question 40

What is the action of Gracilis?

Answer 40

Adducts the thigh; flexes leg; helps rotate leg medially

Question 41

What are the attachments for Obturator Externus?

Answer 41

Proximal: Margins of obturator foramen and obturator membrane Distal: Trochanteric fossa of femur

Question 42

What nerve innervates the Obturator Externus?

Answer 42

Obturator nerve

Question 43

What is the action of Obturator Externus?

Answer 43

Laterally rotates thigh; steadies head of femur in acetabulum

Question 44

What are the attachments of Semitendinosus?

Answer 44

Proximal: Ischial Tuberosity Distal: Medial Surface of superior part of tibia

Question 45

What nerve innervate Semitendinosus?

Answer 45

Tibial Division of Sciatic Nerve

Question 46

What are the actions for Semitendinosus?

Answer 46

Extend the thigh; Flex leg and rotate it medially when knee is flexed, When thigh and leg are flexed, these muscles can extend trunk

Question 47

What are the attachments for Semimembranosus?

Answer 47

Proximal: Ischial Tuberosity Distal: Posterior part of medial condyle of tibia

Question 48

What nerve innervates Semimembranosus?

Answer 48

Tibial Division of Sciatic Nerve

Question 49

What are the actions for Semimembranosus?

Answer 49

Extend the thigh; Flex leg and rotate it medially when knee is flexed, When thigh and leg are flexed, these muscles can extend trunk

Question 50

What are the attachments for Bicep Femoris?

Answer 50

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)

Question 51

What nerve innervates Bicep Femoris?

Answer 51

(Long Head) Tibial division of Sciatic (Short Head) Common fibular division of sciatic

Question 52

What are the actions of Bicep Femoris?

Answer 52

Flexes leg and rotates it laterally when knee is flexed; extends thigh