Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

MSK Exam 2 > LE Muscles > Flashcards

LE Muscles Flashcards

(49 cards)

Start Studying
1
Q

Iliopsoas M.

A

psoas Major M.
psoas Minor M.
Iliacus M.

O: Lateral portion of vertebral bodies T12-L5
I: Lesser Trochanter
A: Chief Flexor of the thigh
N: Psoas Major - L1-L3 Ventral Rami
    Psoas Minor - L1-L2 Ventral Rami
    Iliacus           - Femoral N.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Sartorius M.

A

“Longest muscle in body”
“Tailor sit muscle”

O: ASIS
I: Just below Medial Epicondyle (Pes Anserinus)
A: Flex , ABduct, laterally rotate thigh
     Flex at knee
N: Femoral N.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Rectus Femoris M.

A

“Quadriceps Femoris”

O: Anterior Inferior Iliac Spine (AIIS)
I: Tibial Tuberosity
A: Extend thigh and knee
N: Femoral N.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Vastus Lateralis M.

A

“Quadriceps Femoris”

O: Shaft of Femur
I: Tibial tuberosity
A: Extend Knee
N: Femoral N.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Vastus Medialis M.

A

“Quadriceps Femoris”

O: Shaft of femur
I: Tibial Tuberosity
A: Extend Knee
N: Femoral N.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Vastus Intermedius M.

A

“Quadriceps Femoris”

O: Shaft of Femur
I: Tibial Tuberosity
A: Extend Knee
N: Femoral N.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Pectineus M.

A

O: Pectin line of Pubis
I: Pectineal Line
A: Flex, Adduct Thigh
N: Femoral N.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Adductor Longus M.

A

O: Body of Pubis
I: Linea Aspera (middle 1/3)
A: Adduct and flexes thigh
N: Obturator N.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Adductor Brevis M.

A

O: Body of Pubis
I: Pectineal line & Proximal linea aspera
A: Adduct thigh, assist in thigh flexion
N: Obturator N.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Adductor Magnus M.

A

Adductor part
Hamstring part
(separate at the Adductor Hiatus)

O: Adductor = Ischiopubic Ramus
Hamstring = Ischial Tuberosity
I: Adductor = Gluteal tuberosity, linea
aspera, medial supracondylar
line
Hamstring = Adductor Tubercle (Medial
Epicondyle)
A: Whole muscle = Adducts thigh
Upper = flex thigh
Hamstring = Extend Thigh
N: Adductor: Obturator N.
Hamstring: Tibial Division of Sciatic N.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Gracilis M.

A

O: Body of the Pubis
I: Pes Anserinus
A: Adduct Thigh, assist in medial thigh rotation, flex the knee
N: Obturator N.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Obturator Externus M.

A 
"shows up in anterior portion"
O: External margins of Obturator Foramen
I: Trochanteric Fossa
A: Laterally rotate thigh, stabilize femoral head
N: Obturator N.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Gluteus Maximus M.

A 
O: Posterior Gluteal Line (Lateral Sacral Crest)
I: Gluteal Tuberosity
    Iliotibial Band
A: Chief Extensor of the Thigh
    Lateral Rotation of thigh
    Slight Extension of leg when working with tensor 
     fascia lata
N: Inferior Gluteal N.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Gluteus Medius M.

A

O: Ilium Btw anterior and posterior Gluteal Lines
I: Near Greater Trochanter (lateral aspect)
A: Hip ABductor and medial rotation (Hip Stabilizer)
N: Superior Gluteal N.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Gluteus Minimus M.

A

O: Ilium Btw anterior and posterior gluteal lines
I: Greater trochanter (anterior aspect)
A: Hip ABductor and Medial rotation (Hip Stabilizer)
N: Superior Gluteal N.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Tensor Fascia Lata M.

A

O: ASIS, anterior aspect of iliac spine
I: Iliotibial tract (IT Band), Lateral Tibial Condyle
A: Abducts, medially rotates, flexes thigh
Slightly extends knee (W/ Gluteus Maximus)
N: Superior Gluteal N.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Piriformis M.

A

O: Anterior lateral aspect of sacrum
I: Trochanteric Fossa
A: Laterally rotates LE, ABducts FLEXED hip
N: Nerve to the Piriformis M.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Obturator Internus M.

A

“Tendon is btw the Gemelli Ms.
O: Pelvic Surface of Ilium and ischeium
I: Greater Trochanter
A: Laterally rotate thigh, stabilizes femoral head
N: Nerve to the Obturator Internus M. and Superior Gemellus M.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Superior Gemellus M.

A

O: Ischial Spine
I: Medial aspect of the Greater Trochanter
A: Laterally rotate extended hip, ABducts flexed thigh, stabilizes femoral head
N: Nerve to the Obturator Internus M. and Superior Gemellus M.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Inferior Gemellus M.

Study These Flashcards
A

O: Ischial Tuberosity
I: Medial aspect of the Greater Trochanter
A: Laterally rotate extended hip, ABducts flexed thigh, stabilizes femoral head
N: Nerve to the Quadratus Femoris M. and the Inferior Gemellus M.

21
Q

Quadratus Femoris M.

Study These Flashcards
A

O: Inferior to the acetabulum
I: Quadrate Tubercle
A: Laterally rotate thigh, stabilize head of femur
N: Nerve to the Quadratus Femoris M. and the Inferior Gemellus M.

22
Q

Biceps Femoris M.

Study These Flashcards
A

O: Long Head: Ischial Tuberosity
Short Head: Linea Aspera, Lateral Supracondylar line
I: Long Head: Fibular Head
Short Head: Fibular Head
A: Long Head: Thigh extension, Leg flexion
Short Head: Leg Flexion
N: Long head: Tibial Division of the Sciatic N.
Short Head: Common fibular Division of Sciatic N.

23
Q

Semitendinosus M

Study These Flashcards
A

O: Ischial Tuberosity
I: Pes Anserinus
A: Extend Thigh, Flex leg, (Medially rotate)
N: Tibial Division of the Sciatic N.

24
Q

Semimembranosus M

Study These Flashcards
A

O: Ischial Tuberosity
I: -Medial Tibial Condyle
-Tendon divides off also to blend with Popliteal
Fascia, Becomes the Oblique Popliteal Ligament.
A: Extend Thigh, Flex Leg
N: Tibial Division of the Sciatic N.

25
Gastrocnemius M.
O: Medial Head: Superior to Medial Femoral Condyle Lateral Head: Superior to Lateral Femoral Condyle I: Calcaneus via Calcaneal Tendon (Achilles Tendon) A: Plantarflexion, Flexes leg at Knee N : Tibial N.
26
Soleus M.
O: Soleal Line of Tibia, Posterior head of Fibula, Superior 1/4 of fibula I: Calcaneus via Calcaneal Tendon (Achilles Tendon) A: Plantarflexion N: Tibial N.
27
Plantaris M.
O: Lateral Supracondylar Line I: Calcaneus via Calcaneal Tendon (Achilles Tendon) A: Weak plantarflexion, weak leg flexion N: Tibial N. * Proprioreceptive organ for foot position
28
Popliteus M.
O: Lateral Femoral Condyle, Lateral Meniscus I: Posterior Tibia (superomedial to the soleal line) A: Unlocks extended leg by laterally rotating femur Weakly Flex leg N: Tibial N.
29
Flexor Hallucis Longus M.
O: Inferior 2/3 of the fibula I: Base of distal phalanx of great toe A: Flexes Great toe, Plantarfelx N: Tibial N. *Groove for Flexor Hallucis Longus tendon on Talus B. (btw medial and lateral tubercle of talus) * Sustentaculum Tali (L. that supports Talus B.) (on the Calcaneus)
30
Flexor Digitorum Longus M.
O: Posterior Tibia I: Distal Phalanx base of lateral 4 digits (Crosses superficially over the Flexor Hallucis Longus tendon) A: Flexes Lateral four digits, Platarflex N: Tibial N.
31
Tibialis Posterior M.
O: Interosseous membrane, posterior tibia, posteromedial surface of fibula I: Tarsal Bones (crosses onto bottom of foot) A: Plantarflexion, inversion N: Tibial N. *forms sling on bottom of foot for arch support
32
Tibialis Anterior M.
O: Lateral Tibial Condyle and superolateral 1/2 of Tibia I: Medial cuneiform (Medial Surface to invert) and first metatarsal base A: Dorsiflexion and Eversion N: Deep Fibular N.
33
Extensor Hallucis Longus M.
O: Interosseous Membrane and Anteromedial Fibular Surface I: Base of 1st Distal Phalanx A: Extend the Hallux, Dorsiflex Ankle N: Deep Fibular N.
34
Extensor Digitorum Longus M.
O: Lateral Tibial Condyle, Anterior Fibular Surface, Interosseous Membrane I: 2nd-5th digits middle and distal phalanges (Forms an Extensor Expansion over dorsum over proximal phalanges) (Extensor Expansion) divides into - Two Lateral Slips (Distal Phalanx) - One Central Slip (Middle Phalanx) A: Extends Lateral 4 digits N: Deep Fibular N.
35
Fibularis Tertius M.
O: Anteroinferior aspect of Fibula I: Base of 5th metatarsal B (Dorsal Aspect) A: Dorsiflex, Assist with Eversion N: Deep Fibular N. (Passes Anteriorly to the Lateral Malleolus)
36
Fibularis Longus M.
O: Head and superolateral 2/3 of fibula I: Firat metatarsal and Medial Cunieform (Runs obliquely and distally across sole of foot) A: Eversion, Plantarflexion N: Superficial Fibular N. (Passes Inferiorly to Lateral Malleolus, and across plantar surface of foot to form Sling) - Fibular Trochlea (on Calcaneus) - Groove for Fibularis Longus M. (on Cuboid)
37
Fibularis Brevis M.
O: Inferolateral 2/3 of fibula I: Tuberosity of the 5th metatarsal (Lateral surface) A: Eversion, Plantarflexion N: Superficial Fibular N. (Passes inferiorly to lateral malleolus)
38
Extensor Hallucis Brevis M.
O: Superolateral aspect of Calcaneus I: Base of 1st Proximal Phalanx (in the Extensor Hood) A: Extend the Hallux N: Lateral Branch of the Deep Fibular N.
39
Extensor Digitorum Brevis M.
O: Superolateral aspect of calcaneus I: Join the tendons of the extensor Digitorum Longus M. (Only on digits2-4) A: Extend digits 2-4 N: Lateral Branch of the Deep Fibular N.
40
Abductor Digiti Minimi M.
O: Calcaneal Tuberosity I: Lateral aspect of 5th Proximal Phalanx A: Abduct 5th Digit, Flex 5th Digit N: Lateral Plantar N.
41
Flexor Digitorum Brevis M.
O: Medial Tubercle Calcaneal tuberosity I: Intermediate Phalanges 2nd-5th A: Flex digits 2-5 N: Medial Plantar N. (Tendon splits so the Flexor Digitorum Longus goes through to the distal Phalanges)
42
Abductor Hallucis M.
O: Medial Tubercle Calcaneal Tuberosity I: Medial aspect of 1st proximal phalanx A: Abduct hallux, Flex hallux N: Medial Plantar N.
43
Lumbricals
There are 4 of them O: From the Flexor Digitorum Longus M. Tendons I: Medial aspect of extensor expansions of digits 2-5 A: Flex metatarsophalangeal joints, extend proximal interphalangeal joints, extend distal interphalangeal joints N: (2nd-4th Lumbricals) Lateral Plantar N. (1st Lumbrical) Medial Plantar N. (helps keep toes straight)
44
Quadratus Plantae M.
O: Calcaneus I: Joins Tendon of the flexor Digitorum Longus M. A: Assists in flexion of lateral 4 digits N: Lateral Plantar N. (does not have analog in the hand) (Straightens out the pull of the FDL M.) (without it the toes would flex laterally)
45
Flexor Digiti Minimi Brevis M.
O: Base of 5th Metatarsal I: Base of 5th Proximal Phalanx A: Flexes 5th Digit N: (Deep) Lateral Plantar N.
46
Adductor Hallucis M.
O: Transverse Head= Plantar Metatarsophalngeal joints (2-5) Oblique Head = Base of 2-4 Metatarsals I: 1st Proximal Phalanx A: Adduct Hallux N: (Superficial) Lateral Plantar N.
47
Flexor Hallucis Brevis M.
O: Cuboid, Lateral Cuneiform I: Medial/Lateral heads = 1st Proximal Phalanx A: Flex Hallux N: Medial Plantar N. (Medial/Lateral heads (tendons) have sesamoid bones that protect the Head of the 1st metatarsal) ** Tendon of the Flexor Hallucis Longus runs btw the sesamoid bones so you dont step on it
48
Dorsal Interossei Ms.
DABs (4) O: Bases of 1st-5th Metatarsals I: Both sides of the 2nd digit, Lateral side of 3,4 A: Abduct digits 2-4 N: Lateral Plantar N. (on both sides of 2nd digit, lateral side of 3,4)
49
Plantar Interossei Ms.
PADS (3) O: Bases of 3-5 metatarsals I: 3rd-5th Proximal Phalanges A: Adduct digits 3-5 N: Lateral Plantar N. (on medial sides of metatarsals 3-5)

MSK Exam 2 (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions