Muscles Flashcards
Learn muscles of the axial and appendicular body regions
Orbicularis Occuli
O: medial margin of the orbit
I: Palpebral raphe (in eye socket)
F: closes eye
E: pain, wincing
Frontalis
O: galea aponeurotica
I: Supraorbital muscles and skin
F: raising scalp posteriorly
E:surprise or frown
Buccinator
O: alveolar process of maxilla and mandible and tempromandibular joint
I:in fibres of orbicularis oris
F: compress cheeks against teeth
E:disgust
Orbicularis Oris
O: mid-line of mandible and maxilla
I: mucous membrane of lips
F:compresses and protrudes lips
E: pouting
Zygomaticus Major
O: zygomatic bone
I: modiolus
F: draws corners of mouth laterally and superiorly
E: smile
Masseter Muscles
O: zygomatic arch I: lateral surface of mandibular ramus F: elevation, protrusion, lateral deviation of mandible Innervation: Trigeminal nerve External Shape: quadrate Fibre arrangment: multipennate
temporalis
O: temporal lines/fascia I: coronoid process of mandible F: elevation, protrusion, lateral deviation of mandible Innervation: Trigeminal nerve External Shape: fan Fibre arrangment: bipennate
Medial Pterygoid Muscles
O: medial side of lateral pterygoid plate
I: medial surface of mandibular angle
F: elevation, protrusion, lateral deviation of mandible
Innervation: Trigeminal nerve
Fibre arrangment: multipennate
Lateral Pterygoid Muscles
O: lateral side of lateral pterygoid plate
I: medial surface of TMJ and neck of mandible
F: elevation, protrusion, lateral deviation of mandible
Innervation: Trigeminal nerve
Sternocleidomastoid
O: manubrium and medial portion of clavicle
I: mastoid process of temporal bone
F: lateral flexes neck
Innervation: Accessory nerve
Scalenes
O: transverse process of cervical vertebrae
I: ribs 1 ands 2
F: elevate ribs 1 and 2 and flex and rotate the neck
helps elevate the rib cage during forced inspiration
Intercostal muscles
external (hands in pocket)
internal (hands across)
Splenious Capitis and Splenious Cervicis
O: spinous processes C7-T6 + ligamentum nuchae
I1: mastoid process/ occipital bone
12: transverse process C2-C4
Illiocostalis
most lateral on back
erector spinae
extend
Longissimus
middle
erector spinae
extend
Spinalis
closest
erector spinae
extend
Abdominal muscles
Rectus abdominus Linear alba tendonus inscriptos transverse abdominus Quadratus lumborum - illiac crest, lumbar extension/upright posture psoas major - flexion of hip/ thigh throacolumbar facsia
Pectoralis major
O:body of sternum
I:Greater tubercle of humerous (and intertubercle groove- lateral lip)
S: fan
F:flexion, adduction, medial rotation
Pectoralis Minor
O: anterior surfaces of ribs 3-5
I: corocoid process of scapula
S: fan
F: downward rotation of scapula, elevate ribs
Serratus Anterior
O:Anterior superior margin of ribs
I: Anterior surface of vertebral border of scapula
S: serrated
F: upward rotation of scapula
Trapezius
O: occipital bone
I: acronium, clavicle, spine of scapula
S: trapezoid
F: elevate, retract, depress or rotate scapula and/or clavicles
Latissimus Dorsi
O: spinous process of vertebrae ( inferior thoracic and lumbar)
I: Intertubecular groove on humorous
S: convergent
F: extension, adduction, medial rotation of shoulder
Teres Major
O: Inferior angle of scapula
I: Intertubercular groove on humerous
S: Fusiform
F:extension and media rotation of shoulder
Deltoid
O: Lateral clavicle, accronium and spine of scapula
I: Deltoid tuberosity on humerous
S: triangular
F: Abduction of shoulder joint
Infraspinatus
O: infraspinous fossa
I: Greater tubercle of humerous
S:
F:
Infraspinatus
O: infraspinous fossa
I: Greater tubercle of humerous
F: Lateral rotaton
Supraspinatus
O: supraspinous fossa
I: Greater tubercle of humerous
F: Adbuction
Subscapularius
O:subscapular fossa
I:Lesser tubercle of humerous
F: medial rotation
Teres Major
O: lateral border of scapula
I: Greater tubercle of humerous
F: lateral rotation and abduction
Biceps Branchi
O: Short head- corocoid process Long head - supraglenoid tubercle I: radial tuberosity S: Fusiform, two heads F:flexion of shoulder and elbow
Branchioradialis
O: lateral supracondylar ridge of distal humerous
I: styloid process on radius
F: flexion of elbow
Branchialis
O: Anterior surface of humerous
I: coronoid process of ulna
F: flexion of elbow
Coracobranchialis
O: coracoid process of scapula
I: medial margin of humeral shaft
F:adduction and flexion of shoulder
Triceps Branchi
O:
long head- infraglenoid tubercule of scapula
lateral head - superior lateral margin of humerous
medial head- posterior surfac of humerous inferoir to the radial groove
I: Olecranon process of ulna
S: fusiform - three heads
F: extension of elbow
long head- extension and adduction of shoulder
