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Muscles: Origins, Insertions, Actions, and Innervations

Home Get App Take Quiz Create Buccinator O: Alveolar processes of maxilla and mandible opposite to the molar teeth I: Fibers of Orbicularis Oris A: Compresses cheeks N: Facial Nerve (7) Orbicularis Oris O: Maxilla and Mandible I: Lips A: Compresses, purses lips N: Facial Nerve (7) Risorious O: Fascia surrounding parotid salivary gland I: Angle of mouth A: Draws corner of mouth to the side N: Facial Nerve (7) Levator Anguli Oris O: Maxilla inferior to the infra-orbital foramen I: Skin at the angle of mouth A: Raises corner of mouth N: Facial Nerve (7) Depressor Anguli Oris O: Anterolateral surface of mandibular body I: Skin at angle of mouth A: Depresses corner of mouth N: Facial Nerve (7) Zygomaticus Major O: Zygomatic bone near the zygomaticotemporal suture I: Angle of mouth A: Retracts and elevates corner of mouth N: Facial Nerve (7) Zygomaticus Minor O: Zygomatic bone posterior to the zygomaticomaxillary suture I: Upper Lip A: Retracts and elevates upper lio N: Facial Nerve (7) Orbicularis Oculi O: Medial margin of orbit I: Skin around eyelids A: Closes eye N: Facial Nerve (7) Occipitofrontalis - Frontal Belly O: Epicranial Aponeurosis I: Skin of eyebrow and bridge of nose A: Raises eyebrows and wrinkles forehead N: Facial Nerve (7) Occipitofrontalis - Occipital Belly O: Superior nuchal line and adjacent region of mastoid portion of the temporal bone I: Epicranial Aponeurosis A: Tenses scalp and moves auricle of ear N: Facial Nerve (7) Inferior Rectus O: Sphenoid around optic canal I: Inferior, medial surface of eyeball A: Eye looks down N: Oculomotor Nerve (3) Medial Rectus O: Sphenoid around optic canal I: Medial surface of eyeball A: Eye looks medially N: Oculomotor Nerve (3) Superior Rectus O: Sphenoid around optic canal I: Superior surface of eyeball A: Eye looks up N: Oculomotor Nerve (3) Lateral Rectus O: Sphenoid around optic canal I: Lateral surface of eyeball A: Eye looks laterally N: Abducens Nerve (6) Inferior Oblique O: Maxilla at anterior portion of orbit I: Inferior, lateral surface of eyeball A: Eye rolls, looks up and laterally N: Oculomotor Nerve (3) Superior Oblique O: Spheniod around optic canal I: Superior, lateral surface of eyeball A: Eye rolls, looks down and laterally N: Trochlear Nerve (4) Masseter O: Zygomatic Arch I: Lateral surface and angle of mandibular ramus A: Elevates mandible and closes jaws N: Trigeminal Nerve (5), Mandibular Branch Temporalis O: Along temporal lines of skull I: Coronoid process of mandible A: Elevates mandible and closes jaws N: Trigeminal Nerve (5), Mandibular Branch Sternohyoid O: Clavicle and Manubrium I: Hyoid Bone A: Depresses hyoid bone and larynx N: Cervical Spine Nerves C1-C3 Sternothyroid O: Dorsal surface of manubrium and first costal cartilage I: Thyroid cartilage of larynx A: Depresses hyoid bone and larynx N: Cervical Spinal Nerves C1-C3 Stylohyoid O: Styloid process of temporal bone I: Hyoid bone A: Elevates larynx N: Facial Nerve (7) Sternocleidomastoid - Clavicular Head O: Attaches to sternal end of clavicle I: Mastoid region of skull and lateral portion of superior nuchal line A:Flex the neck along with sternal head; By itself it bends the neck towards the shoulder and turns face to opposite side N: Accessory Nerve (11), Cervical Spinal Nerves C2-C3 Sternocleidomastoid - Sternal Head O: Attaches to Manubrium I: Mastoid region of skull and lateral portion of superior nuchal line A:Flex the neck along with sternal head; By itself it bends the neck towards the shoulder and turns face to opposite side N: Accessory Nerve (11), Cervical Spinal Nerves C2-C3 Splenius O: Spinous processes and ligaments connecting inferior cervical and superior thoracic vertebrae I: Mastoid process, occipital bone of skull, superior cervical vertebrae A: Extend neck; half of it at a time rotates and laterally flexes neck to the same side N: Cervical Spinal Nerves Semisplenius Capitus O: Processes of inferior cervical and superior thoracic vertebrae I: Occipital bone, between nuchal lines A: Extend neck; half of it at a time laterally flexes neck and turns head to opposite sides N: Cervical Spinal Nerves Thoracic Region - External Intercostals O: Inferior border of each rib I: Superior border of more inferior rib A: Elevates ribs N: Intercostal Nerves (Branches of Thoracic Spinal Nerves) Thoracic Region - Internal Intercostals O: Superior border of each rib I: Inferior border of the more superior rib A: Depresses ribs N: Intercostal Nerves (branches of Thoracic Spinal Nerves) Abdominal Region - External Oblique O: External and inferior borders of ribs 5-12 I: External oblique aponeuroses extending ot the linea alba and iliac crest A: Compresses abdomen, depresses ribs, flexes, laterally flexes, or rotates vertebral column to the opposite side N: Intercostal Nerves 5-12, Iliohypogastric, and Ilioinguinal Nerves Abodminal Region - Internal Obliques O: Thoracolumbar fascia and iliac crest I: Inferior surfaces of ribs 9-12, costal cartilages 8-10, linea alba, and pubis A: Compresses abdomen, depresses ribs, flexes, laterally flexes, or rotates vertebral column to the same side N: Intercostal Nerves 5-12, Iliohypogastric, and Ilioinguinal Nerves Abdominal Region - Transversus Abdominus O: Cartilages of Ribs 6-12, iliac crest, and thoracolumbar fascia I: Linea alba and pubis A: Compresses abdomen N: Intercostal Nerves 5-12, Iliohypogastric, and Ilioinguinal Nerves Thoracic Region - Diaphragm O: Xiphoid process, ribs 7-12 and associates costal cartilages, and anterior surfaces of lumbar vertebrae I: Central tendinous sheet A: Contraction expands thoracic cavity, compresses abdominopelvic cavity N: Phrenic Nerves (C3-C5) Abdominal Region - Rectus Abdominis O: Superior surface of pubis around symphysis I: Inferior surfaces of cartilages (ribs 5-7) and xiphoid processes of sternum A: Depresses ribs, flexes vertebral column and compresses abdomen N: Intercostal Nerves (T7-T12) Levator Scapulae O: Transverse processes of first four cervical vertebrae I: Vertebral border of scapula near superior angle A: Elevates scapula N: Cervical Nerves (C3-C4) and dorsal scapular nerve (C5) Pectoralis Minor O: Anterior surfaces and superior margins of Ribs 3-5 and fascia covering the associated external intercostal muscles I: Coracoid process of scapula A: Depresses and protracts shoulder; rotates scapula so glenoid cavity moves inferiorly (downward rotation), elevates ribs if scapula is stationary N: Medial Pectoral Nerve (C8, T1) Rhomboid Major O: Spinous processes of superior thoracic vertebrae I: Vertebral border of scapula from spine to inferior angle A: Adducts and performs downward rotation of the scapula N: Dorsal Scapular Nerve (C5) Rhomboid Minor O: Spinous processes of vertebrae C7-T1 I: Vertebral border of scapula A: Adducts and performs downward rotation of the scapula N: Dorsal Scapular Nerve (C5) Serratus Anterior O: Anterior and superior margins of ribs 1-8 OR 1-9 I: Anterior surface of vertebral border of scapula A: Protracts shoulder; rotates scapula so glenoid cavity moves superiorly N: Long Thoracic Nerve (C5-C7) Trapezius O: Occipital bone, ligamentum nuchae, and spinous processes of thoracic vertebrae I: Clavicle and scapula (acromion and scapular spine) A: Depends on active region and state of other muscles; may elevate, retract, depress, or rotate scapula upward and/or clavicle; can also extend neck N: Accessory Nerve (11) Coracobrachialis O: Coracoid process of scapula I: Medial margin of shaft of humerus A: Adduction and flexion at shoulder N: Musculocutaneous Nerve (C5-C7) Deltoid O: Clavicle and Scapula (acromion and adjacent scapular spine) I: Deltoid tuberosity of humerus A: Whole Muscle - abduction of shoulder. Anterior part - flexion and medial rotation of humerus. Posterior part - extension and lateral rotation of humerus. N: Axilary Nerve (C5-C6) Supraspinatus O: Supraspinous process of scapula I: Greater tubercle of humerus A: Abduction at Shoulder N: Suprascapular Nerve (C5) Infraspinatus O: Infraspinous fossa of scapula I: Greater tubercle of Humerus A: Lateral rotation at shoulder N: Suprascapular Nerve (C5-C6) Subscapularis O: Subscapular fossa of Scapula I: Lesser tubercle of Humerus A: Medial rotation at shoulder N: Subscapular Nerve (C5-C6) Teres Major O: Inferior angle of Scapula I: Medial lip of intertubercular sulcus of Humerus A: Extension and medial rotation at shoulder N: Lower subscapular nerve (C5-C6) Teres Minor O: Lateral border of Scapula I: Greater tubercle of Humerus A: Lateral rotation and adduction at shoulder N: Axillary Nerve (C5) Latissimus Dorsi O: Spinous process of inferior thoracic and all lumbar vertebrae, ribs 8-12, and thoracolumbar fascia I: Flor of intertubercular sulcus of the Humerus A: Extension, adduction, and medial rotation at the shoulder N: Thoracodorsal Nerve (C6-C8) Pectoralis Major O: Cartilages of irbs 2-6, body of sternum, and inferior, medial portion of clavicle I: Crest of greater tubercle and lateral lip of intertubercular sulcus of Humerus A: Flexion, adduction, and medial rotation at shoulder N: Pectoral Nerves (C5-T1) Biceps Brachii - Short Head O: Coracoid Process of Scapula I: Radial Tuberosity A: Flexion at the elbow and shoulder N: Musculocutaneous Nerve (C5-C6) Biceps Brachii - Long Head O: Supraglenoid Tubercle of Scapula I: Radial Tuberosity A: Supination N: Musclocutaneous Nerve (C5-C6) Brachialis O: Anterior, distal surface of Humerus I: Ulnar Tuberosity A: Flexion at the elbow N: Musculocutaneous Nerve (C5-C6) and Radial Nerve (C6-C8) Triceps Brachii - Lateral Head O: Superior, lateral margin of Humerus I: Olecranon of Ulna A: Extension at the Elbow N: Radial Nerve (C6-C8) Triceps Brachii - Long Head O: Infraglenoid tubercle of Scapula I: Olecranon of Ulna A: Extension at the elbow and extension and adduction at the shoulder N: Radial Nerve (C6-C8) Triceps Brachii - Medial Head O: Posterior surface of Humerus, inferior to the radial groove I: Olecranon of Ulna A: Extension at the elbow N: Radial Nerve (C6-C8) Pronator Teres O: Medial epicondyle of Humerus and Coracoid process of Ulna I: Middle of lateral surface of Radius A: Pronates forearm and hand by medial rotation of the Radius at radioulnar joints, flexion at the elbow N: Median Nerve (C6-C7) Supinator O: Lateral epicondyle of Humerus and ridge near radial notch of Ulna I: Anterolateral surface of Radius distal to the radial tuberosity A: Supinates forearm and hand by lateral rotation of Radius at radioulnar joints N: Deep Radial Nerve (C6-C8) Flexor Carpi Radialis O: Medial epicondyle of Humerus I: Bases of second and third metacarpal bones A: Fkexuib abd abduction at wrist N: Median Nerve (C6-C7) Flexor Carpi Ulnaris O: Medial epicondyle of Humerus; adjacent medial surfaces of olecranon and anteromedial portion of Ulna I: Pisiform, hamate, and base of fifth metacarpal bone A: Flexion and abduction at wrist N: Median Nerve (C6-C7) Palmaris Longus O: Medial epicondyle of Humerus I: Palmar aponeurosis and flexor retinaculum A: Flexion at wrist N: Median Nerve (C6-C7) Extensor Carpi Radialis Longus O: Lateral supracondylar ridge of Humerus I: Base of second metacarpal bone A: Extension and abduction at the wrist N: Radial Nerve (C6-C7) Extensor Carpi Radialis Brevis O: Lateral epicondyle of Humerus I: Base of third metacarpal bone A: Extension and abduction at the wrist N: Radial Nerve (C6-C7) Extensor Carpi Ulnaris O: Lateral epicondyle of Humerus; adjacent dorsal surface of Ulna I: Base of fifth metacarpal bone A: Extension and adduction at wrist N: Deep Radial Nerve (C6-C8) Extensor Digitorum O: Lateral epicondyle of Humerus I: Posterior surfaces of the phalanges, digits 2-5 A: Extension at finger joints and wrist N: Deep Radial Nerve (C6-C8) Extensor Pollicis Brevis O: Shaft of Radius distal to origin of abductor pollicis longus and the interosseous membrane I: Base of proximal phalanx of thumb A: Extension at joints of thumb; abduction at wrist N: Deep Radial Nerve (C6-C8) Extensor Digiti Minimi O: Via extensor tendon to lateral epicondyle of Humerus and from intermuscular septa I: Posterior surface of proximal phalanx of little finger A: Extension at joints of little finger and extension at the wrist N: Deep Radial Nerve (C6-C8) Flexor Digitorum Superficialis O: Medial epicondyle of Humerus; adjacent anterior surfaces of the Ulna and Radius I: Bases of middle phalanges of digits 2-5 A: Flexion at proximal interphalangeal, metacarpophalangeal, and wrist joints N: Median Nerve (C7-T1) Flexor Digitorum Profundus O: Medial and posterior surfaces of ulna, medial surfaces of coronoid process, and interosseous membrane I: Bases of distal phalanges of digits 2-5 A: Flexion at distal interphalangeal joints, and proximal interphalangeal joints and wrists N: Anterior Interosseous Branch of Median Nerve and Ulnar Nerve (C8-T1) Flexor Pollicis Longus O: Anterior shaft of Radius, interosseous membrane I: Base of distal phalanx of thumb A: Flexion at joints of the thumb N: Median Nerve (C8-T1) Gluteus Maximus O: Iliac crest, posterior gluteal line, and lateral surface of the Ilium; Sacrum, Coccyx, and Thoracolumbar fascia I: Iliotibial tract and gluteal tuberosity of Femur A: Extension and lateral rotation at hip; helps stabilize the extended knoee; abduction at the fip N: Inferior Gluteal Nerve (L5-S2) Gluteus Medius O: Anterior iliac crest, lateral surface of Ilium between posterior and anterior gluteal lines I: Greater trochanter of the Femur A: Abduction and medial rotation at the hip N: Superior Gluteal Nerve (L4-S1) Tensor Fasciae Latae O: Iliac crest and lateral surface of anterior superior iliac spine I: Iliotibial tract A: Abduction and medial rotation at the hip; extension and lateral rotation at the knee; tenses fasciae latae, which laterally supports the knee N: Superior Gluteal Nerve (L4-S1) Piriformis O: Anterolateral surface of Sacrum I: Greater trochanter of the Femur A: Lateral rotation and abduction of the hip; helps maintain stability and integrity of the hip N: Branches of Sacral Nerves (S1-S2) Adductor Longus O: Inferior ramus of Pubis, anterior to adductor brevis I: Linea aspera of Femur A: Adduction, flexion, and medial rotation at the hip N: Obturator Nerve (L3-L4) Adductor Magnus O: Inferior ramus of Pubis posterior to adductor brevis and ischial tuberosity I: Linea aspera and adductor tubercle of Femur A: Whole Muscle - adduction of the hip. Anterior Part - flexion and medial rotation of the hip. Posterior Part - extension of the hip. N: Obturator and Sciatic Nerves (L3-L4 and S1-S3) Gracilis O: Inferior ramus of Pubis I: Medial surface of tibia inferior to medial condyle A: Flexion and medial rotation at the knee; adduction and medial rotation at the hip N: Obturator Nerve (L3-L4) Iliacus O: Iliac fossa I: Fermur distal to lesser trochanter; tendon fused with that of psoas major A: Flexion at the hip and/or lumbar intervertebral joints N: Femoral Nerve (L2-L3) Psoas Major O: Anterior surfaces and tranverse processes of vertebrae (T12-L5) I: Lesser trochanter in company with iliacus (on Femur) A: Flexion at the hip and/or lumbar intervertebral joints N: Branchesof the lumbar plexus (L2-L3) Biceps Femoris O: Ischial tuberosity and linea aspera of Femur I: Head of Fibula, lateral condyle of Tibia A: Flexion at the knee and extension and lateral rotation at the hip N: Sciatic nerve- the tibial portion (S1-S3) and Common Fibular Branch (L5-S2) Semimembranosus O: Ischial tuberosity I: Posterior surface of medial condyle of Tibia A: Flexion at the knee; extension and medial rotation at the hip N: Sciatic nerve- the tibial portion (L5-S2) Semitendinous O: Ischial Tuberosity I: Proximal, medial surface of Tibia near the insertion of the Gracilis A: Flexion at the knee; extension and medial rotation at the hip N: Sciatic Nerve (Tibial portion L5-S2) Sartorius O: Anterior superior iliac spine I: Medial surface of Tibia, near tibial tuberosity A: Flexion at the knee; abduction, flexion, and lateral rotation at the hip N: Femoral Nerve (L2-L4) Rectus Femoris O: Anterior inferior iliac spine and superior acetabular rim of ilium I: Tibial tuberosity via quadriceps tendon, patella, and patellar ligament A: Extension at the knee; flexion at the hip N: Femoral Nerve (L2-L4) Vastus Intermedius O: Anterolateral surface of Femur and linea aspera I: Tibial tuberosity via quadriceps tendon, patella, and patellar ligament A: Extension at the knee N: Femoral Nerve (L2-L4) Vastus Lateralis O: Anterior and inferior to greater torchanter of Femur and along linea aspera I: Tibial tuberosity via quadriceps tendon, patella, and patellar ligament A: Extension at the knee N: Femoral Nerve (L2-L4) Vastus Medialis O: Entire length of linea aspera of Femur I: Tibial tuberosity via quadriceps tendon, patella, and patellar ligament A: Extension at the knee N: Femoral Nerve (L2-L4) Tibialis Anterior O: Lateral condyle and proximal shaft of Tibia I: Base of first metatarsal bone and medial cuneiform A: Dorsiflexion at the ankle and inversion of the foot N: Deep Fibular Nerve (L4-S1) Gastrocnemius O: Femoral condyles I: Cancaneus via cancaneal tendon A: Plantar flexion at the ankle and flexion at the knee N: Tibial Nerve (S1-S2) Fibularis Brevis O: Midlateral margin of Fibula I: Base of fifth metatarsal bone A: Eversion of foot and plantar flexion at the ankle N: Superficial Fibular Nerve (L4-S1) Fibularis Longus O: Head and proximal shaft of Fibula I: Base of fifth metatarsal bone A: Eversion of foot and plantar flexion at the ankle; supports ankle; supports longitudinal and transverse arches N: Superficial Fibular Nerve (L4-S1) Soleus O: Head and proximal shaft of Fibule, and adjacent posteromedial shaft of Tibia I: Cancaneus via cancaneal tendon A: Plantar flexion at the ankle and postural muscle when standing N: Tibial Nerve (L4-S1) and Sciatic Nerve, Tibial Branch (S1-S2) Tibialis Posterior O: Interosseous membrane and adjacent shafts of Tibia and Fibula I: Navicular, all three cuneiforms, cuboid, second, third, and fourth metatarsal bones A: Inversion of the foot and plantar flexion at the ankle N: Tibial Nerve (L4-S1) and Sciatic Nerve, Tibial Branch (S1-S2) Flexor Digitorum Longus O: Posteromedial surface of tibia I: Inferior surface of distal phalanges, toes 2-5 A: Flexion of joints of toes 2-5 and plantar flexes ankle N: Tibial Branch (L5-S1) Flexor Hallucis Longus O: Posterior surface of Fibula I: Inferior surface, distal phalanx of great toe A: Flexion at joints of great toe; plantar flexes ankle N: Tibial Branch (L5-S1) Extensor Digitorum Longus O: Lateral condyle of Tibia, anterior surface of Fibula I: Superior surfaces of phalanges, toes 2-5 A: Extension of toes 2-5; dorsiflexes ankle N: Deep Fibular Nerve (L5,S1) Extensor Hallucis Longus O: Anterior surface of Fibula I: Superior surface, distal phalanx of great toe A: Extension at joints of great toe; dorsiflexes ankle N: Deep Fibular Nerve (L5, S1)

Author kbb5y2 ID 25743 Card Set Muscles: Origins, Insertions, Actions, and Innervations Description Anatomy Longview Community College Updated 2010-07-06T02:27:55Z Show Answers