Muscles I
Terms
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- 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)