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Basic Muscles Anterior, Posterior
Muscles: Origin, Insertion, Function, and Nerve Supply
105
Anatomy
12th Grade
10/28/2013

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Term
Occipitofrontalis
Definition
Occipital bone
-Tissues of eyebrows
--Raises eyebrows, wrinkles forehead horizontally
---Cranial Nerve VII
Term
Corrugator Supercilii
Definition
Frontal bone: Superciliary ridge
-Skin of Eyebrow
--Wrinkles forehead vertically
---Cranial Nerve VII
Term
Origin
Insertion
Function
Nerve Supply
Definition
Area muscle attaches to bone
-Area affected by muscle
--Effect of muscle contraction
---Nerve feeding muscle
Term
Orbicularis occuli
Definition
Encircles Eyelid
-Closes Eye
---Cranial Nerve VII
Term
Zygomaticus Major
Definition
Zygomatic Bone
-Angle of Mouth
--Laughing - elevates angle of mouth
---Cranial Nerve VII
Term
Orbicularis oris
Definition
Encircles Mouth
--Draws Lips together
---Cranial Nerve VII
Term
Buccinator
Definition
Maxillae
-Skin of sides of mouth
--Permits smiling
--Blowing, as in playing a trumpet
---Cranial Nerve VII
Term
Masseter
Definition
Zygomatic Arch
-Mandible External Surface
--Closes jaw
---Cranial Nerve V
Term
Temporalis
Definition
Temporal Bone
-Mandible
--Closes Jaw
---Cranial Nerve V
Term
Pterygoids lateral and Medial
Definition
Undersurface of skull
-Mandible Medial Surface
--Grates Teeth
---Cranial Nerve V
Term
Sternocleidomastoid
Definition
Sternum and Clavicle
-Temporal Bone Mastoid Process
--Flexes Head: Prayer Muscle
--Rotates head towards opposite side
---Accessory Nerve
Term
Semispinalis Capitis
Definition
Vertebrae: Transverse process of upper six and articular processes of lower 4 cervical
-Occipital Bone: Between superior and inferior nuchal lines
--Extends head; bends it laterally
---First five Cervical Nerves
Term
Sphenius capitis
Definition
Ligamentum Nuchae
-Temporal Bone: Mastoid Process
--Extends Head
---Second, Third, and Fourth Cervical Nerves
Term
Longissiumus Capitis
Definition
Vertebrae: Transverse processes of upper six thoracic, articular processes of lower four cervical
-Temporal Bone: Mastoid Process
--Extends head and Bends and rotates head toward conctracting sides
---Multiple Innervation
Term
External Intercostals
Definition
Rib: Lower border; forward fibers
-Rib: Upper border of rib below origin
--Elevate ribs
---Intercostal Nerves
Term
Internal Intercostals
Definition
Rib: Inner surface, lower border; backward fibers
-Rib: Upper border of rib below origin
--Depress Ribs
---Intercostal Nerves
Term
Diaphragm
Definition
Lower circumference of rib cage
-Central tendon of diaphragm
--Enlarges Thorax, causing inspiration
---Phrenic Nerves
Term
External Oblique
Definition
Ribs: Lower eight
-Pelvis: Iliac Crest and pubis by way of inguinal ligament
--Compresses Abdomen and Rotates Trunk laterally
--Important postural functio of all abdominal muscles is to pull front of pelvis upward, thereby flattening lumbar curveof spine; when these muscles lose thier tone, common figure fautls of protruding abdomen and lordosis develop
---Lower seven intercostal nerves and iliohypogastric nerves
Term
Internal Oblique
Definition
Pelvis: Iliac crest and inguinal ligament
Lumbodorsal fascia
-Ribs: Lower Three
-Linea Alba
--Same as external oblique
---
Term
Transversus Abdominis
Definition
Pelvis: Iliac Crest and inguinal ligament and Lumbodorsial fascia
-RIbs: Lower 3 and Linea Alba
--Same as External Oblique
---Last three intercotal nerves; iliohypogastric and ilioinguinal nerves
Term
Rectus abdominis
Definition
Pelvis: Pubic bone and symphisis pubis
-Ribs: Costal cartilageof fifth, sixth, and sevent ribs
--Same as External Oblique; Also, antagonist of diaphrahm; Also, flexes trunk
---Last six intercostal nerves
Term
Quadratus Lumborum
Definition
Iliolumbar ligament; iliac crest
-Last Rib; transverse process of vertebrae L1-4
--Flexes vertebral column laterally; depresses last rib
---Lumbar
Term
Erector Spinae group; Iliocostalis Group
Definition
Various regions of the pelvis and ribs
-Ribs and vertebra: superior to origin
--Extends, laterally flexes vertebral column
---Spinal, thoracic, or lumbar nerves
Term
Longissimus Group
Definition
Cervical and thoracic vertebrae, ribs
-Mastoid Process, upper cervical vertebrae, or upper lumbar vertebrae
--Extends head, neck, or vertebral column
---Cervical, or Lumbar and Thoracic
Term
Spinalis Group
Definition
Lower cervical or lower thoracic/upper lumbar vertebrae
-Upper cervical or middle/upper thoracic vertebrae: superior to origin
--Extends neck or vertebral column
---Cervical or thoracic nerves
Term
Transversospinalis group and semispinalis group
Definition
Transverse processes of vertebrae T2-11
-Spinous processes of verebrae C2-T4
--Extends neck or vertebral column
---Cervical or thoracic nerves
Term
Multifidus Group
Definition
Transverse processes of vertebrae; sacrum and ilium
-Spinous precesses of (Next Superior) Vertebrae
--Extends, rotates vertebral column
---Spinal Nerves
Term
Rotatores Group
Definition
Transverse processes of vertbrae
-Spinous processes of (Next Superior) vertebrae
--Extends, rotates vertebral column
---Spinal Nerves
Term
Interspinales Group
Definition
Spinous processes of vertebrae
-Spinous processes of next superior vertebrae
--Extends back and neck
---Spinal Nerves
Term
Splenius
Definition
Spinous processes of vertebrae c7-T1 or T3-6
-Lateral occipital/mastoid or transverse processes of vertebrae C1-4
--Rotates, extends neck and flexes neck laterally
---Cervical nerves
Term
Levator ani
Definition
Pubis and spine of ischium
-Coccyx
--Together with coccygeus muscles form floor of pelvic cavity and support pelvic organs
---Pudendal nerve
Term
Ischiocavernosus
Definition
Ischium
-Penis or Clitoris
--Compresses base of penis or clitoris
---Perineal Nerve
Term
Bulbospongiosus (MALE)
Definition
Bulb of Penis
-Pernineum and bulp of penis
--Constricts urethra and erects penis
--Pudendal Nerve
Term
Bulbospongiosus (FEMALE)
Definition
Perineum
-Base of Clitoris
--Erects Clitoris
---Pudendal Nerve
Term
Deep transverse Perinei
Definition
Ishium
-Central Tendon: Median Raphe
--Support pelvic floor
---Pudendal Nerve
Term
Sphincter Urethrae
Definition
Pubic Ramus
-Central Tendon: Median Raphe
--Constrict urethra
---Pudendal nerve
Term
Sphincter Externus Anii
Definition
Coccyx
-Central Tendon: Median Raphe
--Closes anal canal
---Pudendal Nerve and S4
Term
Trapezius
Definition
Occipital Bone
\Cervical and Thoracic Vertebrae
-Clavicle
-\Scapula: Spine and Acromion
--Raises or lowers shoulders and shrugs them
--\Extends head when occiput acts as insertion
---Spinal accessory; second, third, and fourth cervical nerves
Term
Pectoralis Minor
Definition
Ribs: Second to Fifth
-Scapula: Coracoid Process
--Pulls shoulder down and forward
---Medial and lateral anterior thoracic nerves
Term
Serratus anterior
Definition
Ribs: Upper eight or nine
-Scapula: anterior surface, vertebral border
--Pulls shoulder down and forward; abducts and rotates it upward
---Long Thoracic Nerve
Term
Levator Scapulae
Definition
C1-C4 Transverse Processes
-Scapula: Superior Angle
--:Elevates and retractss scapula and abducts neck
---Dorsal Scapular Nerve
Term
Rhomboid Major
Definition
T1-T4
-Scapula: Medial Border
--Retracts, rotates, fixes scapula
---Dorsal Scapular Nerve
Term
Rhomboid Minor
Definition
C6-C7
-Scapula: Medial Border
--Retracts, rotates, elevates, and fixes Scapula
---Dorsal Scapular Nerve
Term
Pectoralis Major
Definition
Clavicle: Medial half; Costal cartilages of true ribs
-Humerus: Greater Tubercle
--Flexes upper arm
---Medial and Lateral anterior thoracic nerves
Term
Latissimus dorsi
Definition
Vertebrae: spines of lower thoracic, lumbar, and sacral; Ilium Crest; Lumodorsal fascia
-Humerus: Intertubercular groove
--Extends upper arm; Adducts upper arm posteriorly
---Thoracodorsal Nerve
Term
Deltoid
Definition
Clavicle
\Scapula: Spine and Acromion
-Humerus: Lateral side: Deltoid Tubercle
--Abducts upper arm
--\Assits in flexion and extension of upper arm
---Axillary Nerve
Term
Coracobrachialis
Definition
Scapula: Coracoid Process
-Humerus: Medial Surface
--Adduction; assists in flexion and medial rotation of arm
---Musculocutaneous Nerve
Term
Supraspinatus (Rotator Cuff)
Definition
Scapula: Supraspinous Fossa
-Humerus: Greater Tubercle
--Assits in abducting arm
---Suprascapular nerve
Term
Teres Minor (Rotator Cuff)
Definition
Scapula: Axillary Border
-Humerus: Greater Tubercle
--Rotates Arm Outward
---Axillary Nerve
Term
Teres Major (Rotator Cuff)
Definition
Scapula: Lower part, axillary border
-Humerus: upper part, anterior surface
--Assits in extension, adduction, and medial rotation of arm
---Lower Subscapular Nerve
Term
Infraspinatus (Rotator Cuff)
Definition
Scapula: Infraspinous Border
-Humerus: Greater Tubercle
--Rotates arm outward
---Suprascapular Nerve
Term
Subscapularis (Rotator Cuff)
Definition
Scapula: subscapular Fossa
-Humerus: Lesser tubercle
--Medial Rotation
---Suprascapular Nerve
Term
Biceps Brachii
Definition
Scapula: supraglenoid Tuberosity
\Scapula: Coracoid
-Radius: Tubercle at Proximal End
--Flexes supinated forearm
--\Supinates forearm and hand
---Musculocutaneous Nerve
Term
Brachialis
Definition
Humerus: Distal half, anterior Surface
-Ulna: front of coronoid process
--Flexes pronated forearm
---Musculocutaneous Nerve
Term
Brachioradialis
Definition
Humerus: Above lateral epicondyle
-Radius: Styloid Process
--Flexes semipronated or semisupinated forearm; supinates forearm and hand
---Radial Nerve
Term
Triceps Brachii
Definition
Scapula: infraglenoid tuberosity
\Humerus: Posterior Surface: Lateral head above radial groove
-Ulna: olecranon Process
--Extends lower arm
---radial Nerve
Term
Pronator Teres
Definition
Humerus: medial Epicondyle; Ulna: Coronoid Process
-Radius: Middle third of lateral surface
--Pronates and flexes forearm
---Median Nerve
Term
Pronator quadratus
Definition
Ulna: distal fourth of anterior surface
-Radius: distal fourth anterior surface
--Pronates forearm
---Median Nerve
Term
Supinator
Definition
Humerus: lateral epicondyle; ulna: proximal fifth
-Radius: proximal third
--Supinates forearm
---Radial Nerve
Term
Flexor Carpi Radialis
Definition
Humerus: medial epicondyle
-Second Metacarpal
--Flexes Hand and Forearm
---Median Nerve
Term
Palmaris longus
Definition
Humerus: Medial Epicondyle
-Fascia of palm
--Flexes hand
---Median Nerve
Term
Flexor carpi ulnaris
Definition
Humerus: medial epicondyle
\Ulna: Proximal 2/3
-Pisiform Bone
-\Third, fourth, and fifth metacarpals
--Flexes hand
--\Adducts Hand
---Ulnar Nerve
Term
Extensor carpi: radialis longus
Definition
Humerus: ridge above lateral epicondyle
-Second Metacarpal
--Extends hand; Abducts hand
---Radial nerve
Term
Extensor Carpi: Radialis brevis
Definition
Humerus: lateral epicondyle
-Fifth metacarpal
--Extends hand
---Radial Nerve
Term
Extensor Carpi Ulnaris
Definition
Humerus: Lateral Epicondyle
\Ulna: Proximal 3/4
-Fifth Metacarpal
--Extends hand;Adducts hand
---Radial Nerve
Term
Flexor digitorum Profundus
Definition
Ulna: anterior surface
-Distal Phalanges
--Flexes distal interphalangeal joints
---Median and ulnar nerves
Term
Flexor digiturm Superficialis
Definition
Humerus: Medial Epicondyle; Radius;Ulna: coracoid Process
-Tendons of fingers
--Flexes fingers
---Median Nerve
Term
Extensor Digitorum
Definition
Humerus: lateral epicondyle
-Phalanges
--Extends fingers
---Radial Nerve
Term
Opponens pollicis
Definition
Trapezium
-Thumb Metacarpal
--Opposes thumb to fingers
---Median Nerve
Term
Abductor pollcis brevis
Definition
Trapezium
-Proximal Phalanx: Thumb
--Abducts thumb
---Median Nerve
Term
Adductor Pollicis
Definition
Second and third metacarpals; Trapezoid; Captitate
-Proximal Phalanx: Thumb
--Adducts thumb
---Ulnar Nerve
Term
Flexor pollicis brevis
Definition
Flexor retinaculum
-Proximal Phalanx: Thumb
--Flexes thumb
---Median and ulnar Nerves
Term
Abductor digiti minimi
Definition
Pisiform
-Proximal Phalanx of fifth finger
--Abducts fifth finger
---Ulnar Nerve
Term
Flexor digiti minimi brevis
Definition
Hamate
-proximal, middle phalanx: 5th finger
--Flexes fifth finger
---Ulnar Nerve
Term
Opponens digiti minimi
Definition
Hamate
-Fifth metacarpal
--opposes fifth finger slightly
---Ulnar Nerve
Term
Interosseous: palmar and dorsal
Definition
Metacarpals
-Proximal phalanges
--Adducts second, fourth, fifth fingers(Palmar)
--\ Abducts second, third, fourth, and fifth fingers (Dorsal)
---Ulnar Nerve
Term
Lumbricales
Definition
Tendons of flexor digitorum Profundus
-Phalanges
--Flexes proximal phalanges
--\Extends middle and distal phalanges
---Median Nerve: phalanges 2-3
---Ulnar Nerve: Phalanges 4-5
Term
Iliapsoas: Iliacus, psoas major, and psoas minor
Definition
Ilium: Iliac fossa; Vertebrae: bodies of T12-L5
-Femur: Lesser trochanter
--Flexes thigh
---Femoral and C2-4
Term
Rectus Femorus (Quad)
Definition
Ilium: anterior, inferior spine
-Tibia: patellar tendon
--Flexes thigh; extends lower leg
---Femoral Nerve
Term
Gluteal Maximus
Definition
Ilium: Crest and posterior surface
\Sacrum and coccyx: Posterior surface
-Illiotibial Tract
--Extends thigh - rotates outward
---Inferior gluteal nerve
Term
Gluteal Minimus
Definition
Ilium: Lateral surface
-Femur: greater trochanter
--Abducts thigh: stabilizes pelvis on femur
---Superior gluteal nerve
Term
Gluteal Medius
Definition
Sacrotuberous ligament; Ilium: Lateral Surface
-Femur: Greater trochanter
--Abducts thigh: rotates outward; stabilizes pelvis on femur
---Superior Gluteal Nerve
Term
Tensor faciae latae
Definition
Ilium: anterior surface of crest
-Tibia: iliotibial tract
--Abducts thigh; tightens iliotibial tract
---Superior gluteal nerve
Term
Adductors: Brevis, Longus, Magnus
Definition
Pubic bone
-Femur: linea aspera
--Adducts Thigh
---Obturator nerve
Term
Gracilis
Definition
Pubic Bone: Below symphysis
-Tibai: medial surface behind sortorias
--Adducts thigh and flexes and adducts leg
---Obturator Nerve
Term
Vastus Lateralis (Quadricep)
Definition
Femur: Linea Aspera
-Tibia: Patellar Tendon
--Extends Leg
---Femoral nerve
Term
Vastus Medialis
Definition
Femur
-Tibia: Patellar Nerve
--Extends Leg
---Femoral Nerve
Term
Vastus Intermedius
Definition
Femur: anterior surface
-Tibia: patellar tendon
--Extends Leg
---Femoral Nerve
Term
Sartorius
Definition
Coxal: anterior superior iliac spines
-Tibia: medial surface of upper end of shaft
--Adducts and feles leg; permits crossing of legs tailor fashion
---Femoral Nerve
Term
Biceps femoris (Hamstring)
Definition
Ishium: Tuberosity
\Femur: Linea Aspera
-Fibula: Head
-\Fibula: lateral Condyle
--Flexes Leg
--\Extends Thigh
---Hamstring Nerve (Sciatic)
Term
Semitendinosus (Hamstring)
Definition
Ishium: Tuberosity
-Tibia: Proximal end, medial surface
--Extends thigh
---Hamstring (Sciatic)
Term
Semimembranosus(Hamstring)
Definition
Ishium: Tuberosity
-Tibia: medial condyle
--Extends Thigh
---Hamstring (Sciatic)
Term
Tibialis anterior
Definition
Tibia: lateral condyle of upper body
-Tasal: first Cuneiform
--Flexes foot
---Common and deep peroneal nerves
Term
Gastrocnemius
Definition
Femur: condyles
-Calcaneus: Achilles Tendon
--Extends foot: plantar flexion
---Tibial Nerve (Sciatic)
Term
Soleus
Definition
Tibia: underneath Gastrocnemius
-Calcaneus: Achilles Tendon
--Extends foot
---Tibial Nerve (Sciatic)
Term
Peroneus Longus
Definition
Tibia: Lateral Condyle
\Fibula: Head and Shaft
-First Cuneiform
-/Base of first metatarsal
--Extend foot: Plantar Flexion
--\Everts foot
---Common peroneal nerve
Term
Peroneus Brevis
Definition
Fibula: Lower 2/3 of shaft
-Fifth metatarsal: Dorsal tubercle
--Everts Foot; Flexes Foot
---Superficial Peroneal Nerve
Term
Peroneus Tertius
Definition
Fibula: distal third
-Fourth and Fifth metatarsals
--Flexes foot; everts foot
---Deep peroneal nerve
Term
Extensor digitorm longus
Definition
Tibia: Lateral conyle; Fibula: anterior surface
-Second and third phalanges
--Dorsiflexion of foot; extension of toes
---Deep peroneal Nerve
Term
Lumbricales: Foot
Definition
tendons of flexor digitorum longus
-Phalanges
--Flex proximal phalanges; Extend middle and distal phalanes
---Lateral and Medial Plantar Nerve
Term
Flexor digiti minimi Brevis: Foot
Definition
Fifth metatarsal
-Proximal phalanx of fifth toe
--Flexes fifth toe
---Lateral plantar nerve
Term
Flexor hallucis brevis
Definition
Cuboid; MEdial and lateral cuneiform
-Proximal phalanx of first toe
--Flexes first toe
---Medial and lateral plantar nerve
Term
Flexor digitorum brevis (Foot)
Definition
Calcaneous; Plantar fascia
-Middle phalanges of toes 2-5
--Flexes toes 2-5
---Medial plantar nerve
Term
Abductor digiti minimi (Foot)
Definition
Calcaneous
-Proximal phalanx of fifth toe
--Abducts fifth toe; flexes fifth toe
---Lateral Plantar Nerve
Term
Abductor hallucis
Definition
Calcaneous
-First toe
--Abducts first toe
---Medial Plantar Nerve
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