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Glossary of Muscles I

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Created by angelic91

Frontalis (Frontal belly)
Facial Expression Group
ORIGIN: Galea aponeurotica
INSERTION: skin of eyebrows, root of nose

ACTION
raises eyebrows, wrinkles forehead




Occipitalis (occipital Belly)
used to form the vertical frown crease on the forehead
Obicularis Oculi
closes eyes, squinting, blinking
Obicularis Oris
your "kisser"
Levator Labii
opens lips, furrows lips
Zygomaticus
raises lateral corners of mouth upward. Used to SMILE
Platysma
neck stabalizer. Tenses skin of the neck during shaving.
Buccinator
used to suck in your cheeks
Risorius
tenses lip
Depressor Anguli Oris
used to pout; pulls the corners of the mouth downward
Depressor Labii Inferiorus
pulls lower lip downward
Temporalis
closes jaw; elevates and raises mandible
Sternocleidomastoid
causes flexion of neck
masseter
prime mover to raise the mandible
Trapezius
shrugging shoulders
Rhomboid
arching back
Latissimus Dorsi
adducts & medially rotates arm; "lat pull down exercise"
Levator Scapulae
Flexes neck
Gluteus maximus
lateral leg lift
Gluteus Medius
steadies pelvis during walking
Diaphragm
ORIGIN: Inferior Ribcage, Costal Cartilages for 1-6 and lumbar vertebra and sternum
ORIGINAL: Central Tendan

ACTION
Breathing



External Intercostals
Breathing , Elevate, Inspire (Inhale)
Internal Intercostals
Internal Intercostals
Breathing, Depress, Expire (Exhale)
External Oblique
Oblique Curles, Flexionof Vertebral column
Internal Oblique
Oblique Curl, Flexion of Vertebral Column
Transverse Abdominous
Compress Abdominal Contents
Rectus Abdominous
Stablize Walking, Intra-abdominal pressure, situps O: Pubic Crest, Pubic Symphasis I: Xiphiod Process
Pectoralis Major
Raise ribs upwards, Draw Shoulders forward O: Anterior Ribs 3-5 I: long line along acromion, scalupular spine and the lateral 1/3 of clavical
Deltoid
Shoulder
ORIGIN: Embraces Insertion of Trapezius, Lateral 1/3 of clavicle, acromion & Spine of Scapula
INSERTION: Deltoid Tuberosity

ACTION:
FLEX: PM Anterior Fibers
EXTENSION: PM Posterior Fibers
ABDUCTION: PM
MEDIAL ROTATION: Anterior Fibers
LATERAL ROTATION: Posterior Fibers








Biceps Brachii
ORIGIN: Long Head of Corcoid Process, Long Head Glenoid Tubercles of Humorous
INSERTION: Radial Tuberosity

ACTION:
FLEXION





Triceps Brachii
Long HEad of teh Glenoid Tubercle, Scapula ,Posterior shaft of Humurus, Medial Head - posterior humeral shaft distal (farther away) to the radial groove
INSERTION:
Common tendon into olecrannon process of ulna

Flexor Carpi Radialis
ORIGIN: Medial epicondyle of humerus
INSERTION:
Base of metacarpals 2 & 3
(insertin tendon is easily seen and provides guide to the position of the radial artery (pulse taking) at wrist

ACTION:
ADDUCTS, Wrist Fexion





Flexor Carpi Ulnaris
ORIGIN: Meidal Epicondyle of the humerus, Olecranon process and posterior surface of ulna
INSERTION: carpals (pisiform and hemate) and bones of metacarpal #5

ACTION:
FLEXION: Prime Mover, Wrist Flexion and abduction, stabilizer



Flexor Digitorum Superficialis
ORIGIN: MEdial Eqpicondyle of Humerus, Coronoid Process of Ulna, shaft of radius
INSERTION: by four tendons into middle fingers (phalanges) of fingers 2-5

ACTION:
FLEXION Wrist & middle phlanges offigners 2 3 4 5, Important when speed and flexion are required of fingers



Palmaris Longus
ORIGIN: Medial Epicondyle of Humerus
INSERTION: Palmar Aponeurosis

ACTION:
FLEXION of wrist
Tenses skin of hand/ palm




BTM
hamstrings
Biceps Femoris
Semitendinosis
Semimebranosis

They cross both knees & hip jionts
PRIME MOVER: THigh Extension and Knee Flexion
Origin Site with Sciatic Nerve

Common injury = pulled hamstrings








HAMSTRINGS
BTM
Biceps Femoris
Semitendonosis
Semimebranousus


Biceps Femoris
ORIGIN: Ischeial Tuberosity, Linea Aspera, Distal Femur (short head)
INSERTION: Common Tendojn passes downward and lterally, (Forming the lateral {side} border of the popliteal fossa) to insert into head of fibula and lateral condyle of tibula

ACTION:
Extends and Flexes Knee
Lateral rotation of of leg (fixed knee)




Semitendinosus
ORIGIN: ISchel Tubrosity in comon with long head of biceps femoris
INSERTION: Medial Aspect of Tibial Shaft

ACTIONS:
Extends thigh at hip
Flexs knee
with the semimembranosus it medially rotates leg





Semimembranosus
ORIGIN: Ischial Tuberosity
INSERTION: Medial condyle of tibia, and via the oblique popliteal ligament to the lateral condyle of femur

ACTON:
EXTENSION of thigh
FLEXION of knee
ROTATION medially of leg





Gastrocnemius
LEG & FOOT Movement Group
ORIGIN:
by 2 heads from medial and lateral condyles of femur
INSERTION:
Posterior of calcaneous via the calcaneal tendon

ACTION:
Plantar FLEXION of Foot (when knee is extended) It crosses knee joint it can flex foot when dorsi-flexed










Soleus
Leg & Foot Movement Group
ORIGIN: Extensive origin from superior tibia, fibula and the interosseous membrane
INSERTION: osterior of calcaneous via the calcaneal tendon
( Same as for gastrocnemius)

ACTION:
Plantar Flexion of foot, important in locomotor and postural muscle while walking, running and dancing





Tibialis Anterior
Leg & Foot Movement Group
ORIGIN: Lateral Epicondyle and the upper 2/3 of tibial shaft, along with interosseous membrane
INSERTION:
by tendan into inferior surface of medial cuneiform and the first metatarsal bone. (2nd toe)


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