Skip to main content

Muscles and their functions..?


If you have any test reviews, homeworks, guides, anything school related that you think can be posted on this website, reach out to me at makingschooleasier@gmail.com  

Large Leg Model
MuscleOriginInsertionAction
1. Psoas MajorBody of lumbar vertebraeLesser trochanter of femurFlex thigh
2. IlliacusIliac fossa
Lesser trochanter of femur
Flex thigh
10. SartoriusAnterior superior iliac spineMedial aspect of proximal tibiaFlex thigh
9. Tensor Fasciae LataeAnterior superior iliac spineIlliotibial tractFlex thigh

*illiacus and psoas major = iliopsoas

Quadriceps FemorisOriginInsertionAction
11a. Rectus FemorisAnterior Inferior Illiac SpineTibial tuberosity/PatellaExtend knee
11b. Vastus MedialisIntertrochanteric line of femurTibial tuberosity/PatellaExtend knee
11c. Vastus LateralisIntertrochanteric line of femurTibial tuberosity/PatellaExtend knee
11d. Vastus IntermediusAnterior lateral surface of femurTibial tuberosity/PatellaExtend knee
11e. Tendon of Quadriceps Femoris
11f. Patellar Ligament
12. PectineusPectineal line of pubisLesser trochanter of femurFlex thigh
13. Adductor LongusPubis near pubic symphysisLinea aspera of femurFlex thigh
14. Adductor MagnusIschilal tuberosityLinea aspera of femurFlex thigh
15. GracilisBody of pubisMedial surface of tibiaFlex thigh
3. Gluteus MaximusDorsal illiumGluteal tuberosity of femurAbduct thigh
4. Gluteus MediusUpper lateral surface of illiumGreater trochanter of femurAbduct thigh


HamstringsOriginInsertionAction
16. SemitendinosusIschial tuberosityMedial aspect of tibial shaftExtend thigh
17. SemimembranosusIschial tuberosityMedial condyle of tibiaExtend thigh
18a. Biceps femoris: long headIschial tuberosityLateral condyle of tibiaExtend thigh
18b. Biceps femoris: short headLinea aspera of femurLateral condyle of tibiaExtend thigh
19. Tibialis anteriorLateral condyle of tibiaMetatarsal 1 Dorsiflexion
20. Extensor hallucis longusAnteromedial shaft of fibulaDistal phalanx 1Dorsiflexion
21. Extensor digitorum longusLateral condyle of tibiaDistal phalanges 2-5Dorsiflexion
22. Fibularis LongusHead of fibulaMetatarsal 1Plantar flexion
23. Fibularis BrevisDiastal portion of fibula shaftProximal end of metatarsal 5Plantar flexion

Triceps SuraeOriginInsertionAction
24b. GastrocnemiusMedial lateral condyle of femurCalcaneusPlantar Flexion
24c. SoleusProximal portion of tibiaCalcaneusPlantar Flexion
24d. Calcaneal (Achilles) tendon
26. PopliteusLateral condyle of femurProximal tibiaPlantar flexion
27. Flexor digitorum longusPosterior surface of tibiaDistal phalanges 2-5Plantar flexion
28. Tibialis PosteriorSuperior portion of tibiaMetatarsals 2-4Plantar flexion
29. Flexor hallucis longusMiddle portion of fibula shaftDistal phalanx 1Plantar flexion
30. Extensor hallucis brevisExtend great toe
31. Extensor digitorum brevisExtend toes
38. Interosseous muscle of foot


Large Arm Model
MuscleOriginInsertionAction
6. Subscapularis
7. DeltoidAcromion and spine of scapula
Deltoid tuberosity of humerus
Abduct arm
8. Pectoralis majorClavicleIntertubercular sulcus of humerusFlex arm
1. SupraspinatusSupraspinous fossa of scapulaGreater tubercule of humerusAbduct humerus
2. InfraspinatusInfraspinous fossa of scapulaGreater tubercule of humerusLateral rotate humerus
4. Teres minorLateral margin of scapulaGeter tubercule of humerusLateral rotate humerus
3. Teres majorPosterior surface at inferior angle of scapulaIntertubercular sulcus of humerusAdduct humerus
5. Latissimus dorsiIliac crestIntertubercular sulcus of humerusExtend arm
9. Biceps brachii HumerusBase of styloid process of radiusFlex elbow
10. BrachialisDistal portion of anterior humerusCoronoid process of ulnaFlex forearm
11. Triceps brachiiHumerusOlecranon process of ulnaExtend forearm
12. Pronator teresCoronoid process of ulnaMidshaft of radiusPronate forearm
25. SupinatorProximal ulnaProximal end of radiusSupinate forearm
13. Flexor carpi radialisMedial epicondyle of humerusBase of metacarpals 2, 3Flex wrist
14. Palmaris longusMedial epicondyle of humerusPalmar aponeurosisFlex wrist
15. Flexor carpi ulnarisMedial epicondyle of humerusBase of metacarpal 5Flex wrist
24. Flexor digitorum superficialisMedial epicondyle of humerusFinger middle phalanges 2-5Flex wrist
20. BrachioradialisDistal end of humerusBase of styloid process of radiusFlex forearm (synergist)
16. Extensor carpi ulnarisLateral epicondyle of humerusBase of metacarpal 5Extend wrist
17. Extensor digitorumLateral epicondyle of humerusFinger distal phalanges 2-5Extend wrist
18. Extensor carpi radialis brevisLateral epicondyle of humerusBase of metacarpal 3Extend wrist
19. Extensor carpi radialis longusLateral epicondyle of humerusBase of metacarpal 2Extend wrist
22. Extensor pollicis brevisInterosseous membraneBase of distal phalanx of thumbExtend thumb
23. Abductor pollicis longusInterosseous membraneMetacarpal 1 Extend thumb
41. Tendon of flexor pollicis longusRadiusExtend thumb







Right Half of Head and Neck
Median Section
18. Lingual
19. Septum of tongue
20. Root of tongue

Eye/EyebrowOriginInsertionAction
65. FrontalisGalea aponeuroticaSkin of eyebrowsRaise eyebrows
66. Orbicularis oculiFrontal bone
Tissue of eyelid
Close eyes
67. Ciliary
98. Galea aponeurotica

Lip/MouthOriginInsertionAction
71. Levator labii superiorisZygomatic boneSkin of upper lipOpen lips
73. Levator anguli orisMaxillaAngle of mouthSmiling
74. Zygomaticus minorZygomatic boneSkin at corners of mouthSmiling
75. Zygomaticus majorZygomatic boneSkin at corners of mouthSmiling
81. MasseterZygomatic archAngle of mandibleClose jaw
82. RisoriusFascia of masseter muscleSkin at angles of mouthDraw lips laterally
76. MentalisMandibleSkin of chinWrinkle chin
77. Depressor labii inferiorisBody of mandibleSkin of lower lipDraw lips inferiorly
78. Depressor anguli orisBody of mandibleSkin at angles of mouthDraws mouth downward
79. Orbicularis orisMandibleSkin at angles of mouthClose lips
80. BuccinatorMolar region of mandibleOrbicularis orisWhistling

Hyoid MovementOriginInsertionAction
88. MylohyoidMedial surface of mandibleHyoid boneElevate hyoid
89. DigastricLower margin of mandibleHyoid boneElevate hyoid
91. StylohyoidStyloid process of temporalHyoid boneElevate hyoid
93. SternohyoidManubriumLower margin of body of hyoidDepress hyoid
94. SternothyroidPosterior surface of manubriumThyroid cartilage of larynxDepress hyoid
95. OmohyoidSuperior surface of scapulaHyoid boneDepress hyoid

Neck MovementOriginInsertionAction
96. Sternocleido mastoidManubriumMastoid process of temporalFlex neck forward
A. Sternal portion
B. Clavicular portion
116. PlatysmaFascia of deltoidLower margin of mandibleTense skin of neck
100. Levator scapulaeTransverse process of C1-C4Medial border of scapulaFlex neck laterally
101. Scalenes (middle)Transverse process of cervicalRibs 1-2Rotate neck
102. Scalenes (anterior)Transverse process of cervicalRibs 1-2Rotate neck

Head MovementOriginInsertionAction
97. TrapeziusOccipital boneAcromion process of scapulaExtend head
99. Splenius capitisSpinous process of C7-T6Transverse process of C2-C4Extend head



Torso Head and Neck
Eye/EyebrowOriginInsertionAction
65. FrontalisGalea aponeuroticaSkin of eyebrowsRaise eyebrows
66. Orbicularis oculiFrontal bone
Tissue of eyelid
Close eyes
67. Ciliary
98. Galea aponeurotica




If you have any test reviews, homeworks, guides, anything school related that you think can be posted on this website, reach out to me at makingschooleasier@gmail.com  

Popular posts from this blog

Setting The Stage For Learning About The Earth

If you have any test reviews, homeworks, guides, anything school related that you think can be posted on this website, reach out to me at makingschooleasier@gmail.com   (These Answers Should Be Used as a Basis For Yours) Exercise 1.1 Submergence Rate Along the Maine Coast The rate of submergence is the total change in elevation of the pier 2 meters divided by the total amount of time involved 300 years and is therefore .67 cm/yr Exercise 1.4  Sources of Heat for Earth Processes A. The sand should be hot since the sun has been heating up the sand throughout the day. i. When you dig your feet into the sand you should feel cooler sand since the sun's penetration into the earth is limited. ii. This suggests that the Sun can only penetrate into the Earth up until a certain depth. iii.Based on this conclusion, one can assume that the Sun is not responsible for the Earth's internal heat since, we have heat hundreds of kilometers within the Earth and this can not be exp

The Romantics: John Keats and Samuel T. Coleridge

If you have any test reviews, homeworks, guides, anything school related that you think can be posted on this website, reach out to me at makingschooleasier@gmail.com   PART OF THIS ESSAY HAS BEEN  OMITTED  FOR FULL ESSAY COMMENT,EMAIL, LIKE, FOLLOW US                                    The Romantics: John Keats and Samuel T. Coleridge         The Romantic Period in England had six major poets, William Wordsworth, Lord Byron, Percy Shelley, William Blake, John Keats, and Samuel Coleridge. For the purpose of this essay, the focus will only be on Keats and Coleridge. Although they were contemporaries, they each have very different styles of writing as is evident in their poetry. In “This Lime Tree Bower My Prison” an exemplary example of a conversation poem, the reader is able to see Coleridge’s thought process of how he realizes nature is everywhere around oneself, as long as all “facult[ies] of sense and…the heart [are] awake to Love and Beauty”.

O captain my captain and do not go gentle into that good night

If you have any test reviews, homeworks, guides, anything school related that you think can be posted on this website, reach out to me at makingschooleasier@gmail.com   In Walt Whitman’s “O Captain! My Captain!” and in Dylan Thomas’ “Do Not Go Gentle Into That Good Night”, the reader is presented with two venerable characters of different backgrounds; both which have deep admiration for the poem’s character. With the authors use of diction, figurative language and tone, the reader is able to see just how much some people have an effect on others and what their death brings upon the author and the reader’s mind. In Whitman’s poem, the reader is able to see the heavy use of metaphors throughout the poem.  Whitman’s entire poem is a metaphor. “Captain” is the metaphor for Abraham Lincoln, but on a first reading or without the footnote that is provided, this poem would be very ambiguous. The author’s tone throughout is very prideful and full of admiration towards the President. He