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Flashcards in Pelvis & Thigh Muscles Deck (32)
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1

Quadriceps Femoris

They all have a common insertion and all EXTEND the knee ‘TF Joint’ but they all have different Origins.
Additionally, Rectus Femoris Flex’s the Hip.
( Coxal Joint )
Both Vasuts Lateralis (External Rotation) & Vastus Medialis (Internal Rotation) play a small part in the rotation of the KNEE Joint.

2

Rectus Femoris Origin and Insertion.

2!!! ORIGINS: AIIS + Upper margin of the accetabulum

INSERTION: common insertion tendon ( Quadriceps Tendon all the way to the patellar ligament over the patella to the tibial tuberosity )

3

Vastus Medialis Origin and Insertion.

ORIGIN: Medial lip of Linea aspera

INSERTION: common insertion tendon ( Quadriceps Tendon all the way to the patellar ligament over the patella to the tibial tuberosity )

4

Vastus Lateralis Origin and Insertion.

ORIGIN: Lateral lip of Linea Aspera, Gluteal Tuberosity & Greater Trochanter

INSTERION: common insertion tendon ( Quadriceps Tendon all the way to the patellar ligament over the patella to the tibial tuberosity )

5

Vastus Intermedialis Origin and Insertion.

ORIGIN: Anterior & Lateral shaft of the Femur

INSERTION: common insertion tendon ( Quadriceps Tendon all the way to the patellar ligament over the patella to the tibial tuberosity )

6

Hamstrings

Posterior Surface of the Thighs.
Strong Hip Extensors and Knee Flexors.
All three main Hamstrings share a same Origin which is the Ischial Tuberosity. (Except the short head of the Biceps Femoris)

7

Biceps Femoris Origin, Insertion and Action

ORIGIN:
Long head - Ischial Tuberosity

Short head - Lateral Line of Linea

INSERTION: Head of the fibula

ACTION:
Flex the knee (TF Joint)

Laterally rotate the flexed knee (TF Joint)

Long Head:
Extend the hip ( Coxal Joint)
Short Head:
Assists in laterally rotating the hip.
Tilting the pelvis posteriorly

8

SemiTendinosus Origin, Insertion and Action

ORIGIN: Ischial tuberosity

INSERTION: Pes anserinus attachment site ( Proximal Medial shaft of the Tibia )

ACTION: Flexion of Knee ( TF Joint ) + Medial Rotation of Flexed Knee
Extension of Hip ( Coxal Joint ) + Assisting in Medial rotation of the Hip

9

SemiMembranosus Origin, Insertion and Action

ORIGIN: Ischial Tuberosity

INSERTION: Proximal Posterior Medial aspect of the Condyles of Tibia

ACTION: Flexion of Knee + Medial Rotation of Flexed Knee
Extension of the Hip + Assisting in Medial Rotation of the Hip

10

Gluteal Muscles

Gluteus Medius and Maximus are strong Hip extensors and Abductors. So you could say that they

Gluteus Minimus is inaccessible to Palpation, however its dense fibers can be felt beneath the Medius. It FLEXES and MEDIALLY Rotates the Hip.

11

Gluteus Maximus Origin, Insertion and Action.

ORIGIN: Posterior aspect of Iliac Crest, Lateral side of Sacrum, Coccyx

INSERTION: ITT ( Ilio-Tibial Tractc ) + Gluteal Tuberosity

ACTION: Abduction, Lateral Rotation of
the Hip, Extension of the Hip

12

Gluteus Medius Origin, Insertion and Action.

ORIGIN: Gluteal Line of the Ilium

INSERTION: Lateral aspect of the Greater Trochanter

ACTION: Prime mover of the Abduction of the Hip

Anterior fibers assist in Flexion and Medial Rotation of the Hip

Posterior Fibers assist in extension and Lateral Rotation

13

Gluteus Minimus Origin, Insertion and Action.

ORIGIN: Between Anterior and Inferior Gluteal Line ( Gluteal Line )

INSERTION: Anterior aspect of the Greater Trochanter

ACTION: Medial Rotaion, Abdcution, Flexion of the Hip

14

Adductor Group ( 5 Adductor Muscles )

They are all located along the Medial Thigh between the Hamstrings and the Quadriceps Femoris Muscles.

They all Adduct, Medially Rotate, Assist to FLEX the hip ( NOT the Gracilis = Flexes the Knee & Medially Rotates the Knee )

Posterior Fibers of the Adductor Magnus Extend the Hip

15

Adductor Magnus Origin, Insertion.

ORIGIN: Inferior Pubic Ramus + Ischial Ramus + Ischial Tuberosity

INSERTION: Adductor Tubercle + the Medial Lip of Linea Aspera

16

Adductor Brevis

ORIGIN: Inferior Ramus of Pubis

INSERTION: Pectinal Line and Medial lip of Linea Aspera

17

Adductor Longus

ORIGIN: Pubic Tubercle

INSERTION: Pectinal Line and Medial lip of Linea Aspera

18

Pectinus

ORIGIN: Superior Ramus of Pubis

INSERTION: Pectinal Line

19

Gracilis

ORIGIN: Inferior Ramus of Pubis

INSERTION: Pes Anserinus Attachment Site

20

Tensor Fascia Latae

ORIGIN: Iliac Crest, Posterior to the AIIS

INSERTION: Ilio-Tibial Tract - Lateral condyle of Tibia

21

Sartorius

ORIGIN: ASIS

INSERTION: Pes Anserinus Attachment Site

ACTION: Flexion of the Hip and Knee, Abducts, Laterally Rotates the Hip, Medially Rotates the Flexed Knee

22

Lateral Rotators of the Hip ( 6 Small muscles )

They all Laterally Rotate the hip ( Of course ).

23

Piriformis Origin and Insertion.

ORIGIN: Anterior Surface of Sacrum

INSERTION: Superior aspect of Greater Trochanter

24

Quadratus Femoris Origin and Insertion.

ORIGIN: Lateral border of Ischial Tuberosity

INSERTION: Intertrochanteric Crest, Between Lesser and Greater Trochanter

25

Oburator Internus Origin and Insertion.

ORIGIN: Oburator membrane and inferior surface of Oburator Foramen

INSERTION: Medial surface of Greater Trochanter

26

Oburator Externus Origin and Insertion.

ORIGIN: Rami of pubis and Ischium, Oburator Foramen

INSERTION: Trochanteric Fossa of Femur

27

Gemellus Superior Origin and Insertion.

ORIGIN: Ischial Spine

INSERTION: Medial surface of Greater Trochanter

28

Gemellus Inferior Origin and Insertion.

ORIGIN: Ischial Tuberosity

INSERTION: Medial surface of Greater Trochanter.

29

Illiopsoas muscles ( 2 + 1 muscles )

Important hip Flexors and Trunk Stabilizers.
The Psoas Minor is only present in 40% of the population.

30

Psoas Major Origin, Insertion and Action.

ORIGIN: Bodies and Transverse processes of Lumbar Spine. ( L1 - L4 )

INSERTION: Lesser Trochanter

ACTION:
With the Origin Fixed
- Flexion of the Hip + assist in Lateral Rotation of the Hip
With Insertion Fixed
- Flexion of the Trunk + Tilting Pelvis Posteriorly
Unilaterally
- They assist in the lateral Flexion of the Lumbar Spine