Skeletal Muscles

Anatomy 1 with Sf at University of California - Los Angeles

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By: Jearelly Pinedo
Created: 2011-03-16
Size: 65 flashcards
Views: 6

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Trapezius

A: Extends, elevates and retracts scapula

extends head

Latissimus dorsi

A: Extends, adducts, and medially rotates arm

Serratus anterior

A: Protracts and rotates scapula superiorly and laterally (boxer's muscle)

Pectoralis minor

Draws scapula anteriorly and inferiorly

Rhomboids

A: Stabalize scapula

Supraspinatus (OIA)

O: supraspinous fossa of scapula
I: greater tubercle of the humerus
A: Abducts and stabilizes humerus

Infraspinatus (OIA)

O: infraspinous fossa
I: greater tubercle of the humerus
A: Lateral Rotation of the humerus

Subscapularis (OIA)

O: subscapular fossa of scapula
I: Lesser tubercle of humerus
A: medial rotation of humerus, stabilizes shoulder joint

Teres Major (OIA)

O: Posterior surface of inferior angle of scapula
I: Lesser tubercle
A: Synergist to latissimus dorsi (extends, adducts and medially rotates arm)

Teres Minor (OIA)

O: lateral border of scapula
I: Greater tubercle of humerus
A: Lateral rotation of humerus

Pectoralis major

Flexes, adducts and medially rotates arm

Deltoid

Abducts arm

Psoas Major (OIA)

O: Lumbar vertebrae
I: Lesser trochanter
A: Prime mover in thigh flexion and in flexing trunk

Illiacus (OIA)

O: Iliac Fossa
I: Lesser trochanter of the femur
A: Prime mover in thigh flexion and in flexing trunk

Sartorius (OIA)

O: Anterior superior iliac spine
I: Tibia
A: Flexes, abducts and laterally rotates thigh; flexes knee

Adductor longus

Adducts, flexes, and medially rotates thigh

Adductor Magnus

Adducts, flexes, and medially rotates thigh

Pectineus

Adducts, flexes, and medially rotates thigh

Gracilus

Flexes knee
adducts and medially rotates thigh

External Intercostals

A: Raises Rib for inspiration (synergist to diaphragm)

Internal Inercostals

Depresses riv for forced expiration

Diaphragm

A: Prime muscle of inspiration (flattens on contraction)

Linea Alba

connective tissue running vertically (white line)

Rectus abdominus

Floats and rotates trunk

External oblique

Flexion and roation of trunk
lateral flexion

Internal Oblique

Flexion and rotation of trunk
Lateral flexion

Transversus abdominus

Compresses abdominal contents

Rectus Femoris (OIA)

O: Anterior inferior iliac spine
I: Patella and tibial tuberosity
A: Extends knee

Vastus Lateralis (OIA)

O: Greater trochanter
I: Patella and tibial tuberosity
A: Extends Knee

Vastus medialis (OIA)

O: Linea aspera
I: Patella and tibial tuberosity
A: Extends knee

Vastus intermedius (OIA)

O: Proximal femur
I: Patella and tibial tuberosity
A: Extends knee

Tensor fascia Latae (OIA)

O: Iliac crest and anterior superior iliac spine
I: Illiotibial tract- the fascia lata that ensheathes all the muscles of the thigh
A: Steadies trunk on thigh

Gluteus maximus

A: major extensor of thigh

Gluteus medius

Abduction and medial thigh rotation

Semimembranosus (OIA)

O: Ischial tuberosity
I: Medial condyle of tibia
A: Extends thigh, flexes knee

Semitendinosus (OIA)

O: Ischial tuberosity
I: Medial aspect of proximal tibia
A: Extends thigh, flexes knee

Biceps Femoris (OIA)

O: Ischial tuberosity of femur
I: Fibula and Tibia
A: Extends thigh, flexes knee

Gastrocnemius (OIA)

O: Medial and lateral condyles of femur
I: Via achilles tendon onto calcaneus
A: Plantar flexes foot; flexes lower leg

Soleus (OIA)

O: Head of fibula and tibia
I: Calcaneal tendon onto calcaneus
A: Plantarflexes foot

Tibialis anterior (OIA)

O: Lateral Condyle and tibial shaft
I: Medial cuneiform and first metatarals
A: Prime mover of dorsiflexion

Peroneus (fibularis) longus (OIA)

O: Head of fibula
I: First metatarsal and medial cuneiform
A: Plantarflexion and foot eversion

Epicranius

biparite muscle consisting of a frontal belly and occipital belly attached by galea aponeurotica

Frontal Belly

Raises eyebrows

Occipital Belly

Pulls scalp posteriorly

Masseter

Prime mover of jaw closure
elevates mandible

Temporalis

Closes jaw

Zygomaticus (major and minor)

Raises corners of mouth, smiling muscle

Levator Labii superioris

Raises upper lip

Risorius

Draws corner of lip laterally; synergist to zygomaticus

Orbicularis oculi

Closes eye

Orbicularis oris

Closes and puckers lip
Kiss/whistling muscle

Buccinator

Compresses cheek
For whistling and sucking

Sternothyroid

Pulls larynx and hyoid bone inferiorly (depresses)

Sternohyoid

Depresses hyoid and larynx

Thyrohyoid

Depresses hyoid or elevates larynx

Gigastrix "two bellies"

Open mouth and depresses mandible

Mylohyoid

Elevates hyoid

Sternocleidomastoid

Singly, rotates head to opposite shoulder
Together, flexes head

Erector Spinae

Prime moves of back extension

Superior Rectus rotates eyeball __________ and ___________

Superiorly (elevates)
Medially (adducts)

Inferior Rectus rotates eyeball __________ and ____________

Inferiorly (depresses)
Medially (adducts)

Medial Rectus rotates eyeball __________

Medially (adducts)

Lateral rectus rotates eyeball ________

Laterally (abducts)

Superior Oblique rotates eyeball ________ and ________

Inferiorly (depresses)
Laterally (abducts)

Inferior Oblique rotates eyeball ________ and ___________

Superiorly (elevates)
Laterally (abducts)

About this deck

By: Jearelly Pinedo
Created: 2011-03-16
Size: 65 flashcards
Views: 6

About StudyBlue

“I have used this website for three exams, and I see a huge difference in my test results.”
Naj