Anterior Thigh Muscles Flashcards
What are the anterior thigh muscles?
- Sartorius
- Articularis Genu
- Quadriceps Femoris (Rectus Femoris, Vastus Medialis, Vastus Lateralis, Vastus Intermedialis)
Sartorius Muscle Origin
Anterior Superior Iliac Spine (ASIS)
Sartorius Muscle Insertion
Proximal, medial surface of tibia into Pes Anserinus
Sartorius Muscle Innervation
Femoral Nerve (L2-L3)
Sartorius Muscle Action
FABER - Hip Flexion, Hip Abduction, Hip External rotation, Knee Flexion
Articularis Genu Muscle Origin
Inferior Anterior Femur
Articularis Genu Muscle Insertion
Superior margin of knee joint capsule
Articularis Genu Muscle Innervation
Femoral Nerve (L2-L4)
Articularis Genu Muscle Action
Pulls the capsule of the knee up with knee extension
What are the 4 Quadriceps Femoris Muscles?
- Rectus Femoris
- Vastus Intermedius
- Vastus Medialis
- Vastus Lateralis
Rectus Femoris Origin
Straight Head: Anterior Inferior Iliac Spine
Reflected Head: Groove above the acetabulum
Rectus Femoris Insertion
Base of Patella and tibial tuberosity via patellar ligament
Rectus Femoris Innervation
Femoral Nerve (L2-L4)
Rectus Femoris Action
Knee Extension, Hip flexion
Vastus Lateralis Origin
Lateral lip linea aspera (upper 1/2), lateral margin gluteal tuberosity, margin of greater trochanter, lateral part of intertrochanteric line.
Vastus Lateralis Insertion
Lateral border of patella and tibial tuberosity via patellar ligament
Vastus Lateralis Innervation
Femoral nerve (L2-L4)
Vastus Lateralis Action
Knee Extension
Vastus Medialis Origin
Medial Supracondylar line, Medial lip linea aspera, pectineal line, medial part of intertrochanteric line of femur
Vastus Medialis Insertion
Medial border of patella and tibial tuberosity via patellar ligament
Vastus Medialis Innervation
Femoral nerve (L2-L4)
Vastus Medialis Action
Knee Extension
Vastus Intermedius Origin
Upper 2/3 anterior and lateral surface of femur to lateral lip of linea aspera
Vastus Intermedius Insertion
Base of Patella and tibial tuberosity via patellar ligament
Vastus Intermedius Innervation
Femoral Nerve (L2-L4)
Vastus Intermedius Action
Knee Extension
Gracilis Origin
Inferior margin of pubic ramus
Gracilis Insertion
Proximal, Medial surface of tibia into Pes Anserinus
Gracilis Innervation
Obturator nerve - anterior division (L2-L3)
Gracilis Action
Hip adduction; Knee flexion
Pectineus Origin
Pecten Pubis (Pectineal Line)
Pectineus Insertion
Pectineal line of femur bone
What quadriceps muscle acts at both the knee and hip?
The Rectus Femoris. it does Hip flexion and knee extension
Pectineus Innervation
Femoral Nerve (L2-L3)
Pectineus Action
Hip flexion; Hip adduction
Adductor Longus Origin
By cordlike tendon from pubic body just inferior to pubic tubercle and crest
Adductor Longus Insertion
Middle 1/3 medial lip of linea aspera of femur
Adductor Longus Innervation
Obturator nerve - Anterior division (L2-L4)
Adductor Longus Action
Adduction of hip, Assists with medial rotation
Adductor Brevis Origin
Inferior pubic ramus between origins of gracilis and obturator externus
Adductor Brevis Insertion
Upper 1/3 of medial lip of linea aspera and posterior surface of femur to lesser trochanter
Adductor Brevis Innervation
Obturator nerve - anterior and/or posterior divisions (L2-L3)
Adductor Brevis Action
Hip Adduction, Weak medial rotation
Adductor Magnus Origin
Adductor Part: Ischiopubic ramus
Hamstring Part: inferior part of ischial tuberosity
Adductor Magnus Insertion
Adductor Part: Medial margin gluteal tuberosity, intermediate lip of linea aspera, medial supracondylar ridge
Hamstring Part: Adductor tubercle
Adductor Magnus Innervation
Adductor Part: Obturator nerve - posterior division (L2-L4)
Hamstring Part: Tibial division of sciatic nerve (L4)
Adductor Magnus Action
Hip adduction and assists with medial rotation; Hip extension by hamstring portion
What quadriceps muscle acts at both the knee and hip?
The Rectus Femoris. it does Hip flexion and knee extension
Adductor Hiatus Location
Adductor canal leads to adductor hiatus
opening in adductor magnus’ insertion
Adductor Hiatus Contents
- Femoral Artery and vein
2. Articular branch of obturator nerve
True or False: The Femoral artery and vein become popliteal artery and vein once they pass through the Adductor Hiatus
True
Bones involved in the hip joint:
Acetabulum and femur head
What are the structures of the acetabulum?
- Ilium
- Ischium
- Pubis
- Acetabular notch
Direction of the femoral head in the hip joint
Directed medially, superiorly, and slightly anterior.
Function of the Acetabular labrum?
Increase the surface area of the acetabulum for a better fit with the femur head.
Hip Joint Classification
Synovial; Ball and Socket
Transverse acetabular ligament
Continuation of acetabular labrum over acetabular notch
Ligamentum Teres (Ligament of the head of the femur)
- Attached to fovea capitis
- Two bands attaching to both sides of acetabular notch and transverse acetabular ligament
- Lined with synovial membrane
- Houses branch of obturator artery
- helps check abdution
Ligamentum Teres (Ligament of the head of the femur)
- Attached to fovea capitis
- Two bands attaching to both sides of acetabular notch and transverse acetabular ligament
- Lined with synovial membrane
- Houses branch of obturator artery
- helps check abduction
Ligamentum Teres (Ligament of the head of the femur)
- Attached to fovea capitis
- Two bands attaching to both sides of acetabular notch and transverse acetabular ligament
- Lined with synovial membrane
- Houses branch of obturator artery
- helps check abduction
Blood supply to the hip
- From obturator artery
- Acetabular branch
- Artery of ligament of the head - goes through the ligamentum teres to the head of the femur
Ligaments of the hip Joint
- Iliofemoral ligament
- Pubofemoral ligament
- Ischiofemoral ligament
Ligaments of the hip Joint
- Iliofemoral ligament
- Pubofemoral ligament
- Ischiofemoral ligament
Iliofemoral Ligament
- Strongest ligament in the body
- Keeps extension in check
- Runs from Asis and upper rim of acetabulum into 2 parts: 1. Transverse: Femoral neck and upper portion of intertrochanteric line 2. Descending: Descending to lower portion of intertrochanteric line
Pubofemoral ligament
- Runs from obturator crest of pubic bone and blends with joint capsule and medial portion of iliofemoral ligament
- Checks extension and abduction of hip
Pubofemoral ligament
- Runs from obturator crest of pubic bone and blends with joint capsule and medial portion of iliofemoral ligament
- Checks extension and abduction of hip
Ischiofemoral ligament
- Runs form ischial portion of acetabular rim superior/lateral to the femoral neck spiraling to medial side base of greater trochanter
- Weak ligament
- Most posterior strength is from gluteal muscles
Ischiofemoral ligament
- Runs form ischial portion of acetabular rim superior/lateral to the femoral neck spiraling to medial side base of greater trochanter
- Weak ligament
- Most posterior strength is from gluteal muscles
Hip joint: Movements:
- Flexion/Extension
- Abduction/ Adduction
- Medial/Lateral Rotation
- Circumduction
Hip Joint: Accessory Structures
- Sacrotuberous ligament
2. Sacrospinous ligament
Hip Joint: Nerve Supply
- Femoral
- Obturator
- Superior gluteal
Hip Joint: Nerve Supply
- Femoral
- Obturator
- Superior gluteal
Blood supply to hip and thigh
Abdominal Aorta -> Right/Left common iliac Artery -> Internal Iliac and External Iliac Artery
What are the branches of the internal Iliac artery?
- Superior Gluteal Artery
- Inferior Gluteal Artery
- Obturator Artery
What are the branches of the external iliac artery?
Nothing, the femoral artery is a continuation of the External iliac artery.
Where does the name change of the external iliac artery?
As the external iliac artery passes the inguinal ligament it changes names to Femoral artery.
What are the branches of femoral artery?
- Profunda Femoris (deep artery of the thigh)
- Medial circumflex Artery
- Lateral Circumflex Artery
- Perforating Branches ( there are 4)
Which arterial branches exit through the greater sciatic foramen?
Super and inferior gluteal arteries (they are branches of the internal iliac artery)
Which arterial branch exits through the greater obturator foramen?
Obturator Artery
Superior Gluteal Artery Pathway
travels superior to Piriformis muscle through greater sciatic foramen
Supplies gluteus Minimus and Medius
Inferior Gluteal Artery Pathway
Travels inferior to piriformis muscle through greater sciatic foramen and supplies Gluteus Maximus and deep gluteal muscles
Obturator Artery Pathway
Travels to obturator foramen then branches into anterior/posterior division
Posterior division has acetabular branch that travels up acetabular notch to femoral head
External iliac pathway
Becomes femoral artery after passing under the inguinal ligament.
Travels through femoral triangle, down the adductor canal, through adductor hiatus to popliteal space.
Changes names to popliteal artery as it passes through adductor hiatus.
Femoral Artery Pathway
Profunda Femoris Artery (deep femoral artery)
- Branch of Femoral artery
- Asses superficial to pectineus, then deep to adductor longus
Branches of the Profunda Femoris Artery
- Medial femoral circumflex artery
- Lateral femoral circumflex artery
- Four perforating branches
Profunda Femoris Artery - Medial femoral circumflex
Travels medial and posterior to neck of femur
Supplies most of head and neck of femur
Profunda Femoris Artery - Lateral femoral circumflex
Travels deep to sartorius and rectus femoris muscles toward anterior surface of femur
has three branches: 1. Ascending, 2. Transverse, and 3. Descending
Profunda Femoris Artery and 4 perforating branches
Given as the profunda femoris artery travels distallly piercing through the adductor magnus to supply the posterior thigh.
True/False: The first perforating branch travels superior to the Adductor Brevis Muscle?
True
True/False: The second perforating branch travels superior to the Adductor Brevis Muscle?
False - It travels anterior
True/False: The third perforating branch travels Inferior to the Adductor Longus Muscle?
False - it travels inferior to the adductor brevis muscle
True/False: The Terminal end of the profunda femoris is the end of the profunda femoris
True
Femoral Nerve Pathway
Lies lateral to femoral artery in the femoral triangle
not in the femoral sheath
Supplies anterior thigh muscles, skin on ant/med thigh and medial side of leg and foot
Femoral Nerve Branches
Anterior Cutaneous branch: Supplies skin to anterior thigh and knee
Motor nerve branches: To anterior thigh muscles
Saphenous nerve: Cutaneous; Travels with femoral vessels through adductor canal; superficial to medial side of knee; travels down leg to supply medial side of leg and foot
Obturator nerve - posterior branch
Travels posterior to the Adductor Brevis Muscle
Supplies obturator externus muscle, adductor brevis and adductor magnus (adductor portion)
Obturator nerve - anterior branch
Travels anterior to the Adductor Brevis Muscle
Supplies Adductor Longus, Gracilis, and Adductor Brevis
What are the two branches of the obturator nerve?
Posterior and anterior branches
True or false: the obturator nerve exits the pelvis through the obturator canal?
True