Theory Flashcards
Deep external rotators
Piriformis Quadratus Femoris Obturator Internus Obturator Externus Gemellus Superior Gemellus Inferior
Hip Flexors
Rectus femoris acts as a hip flexor
Hip Adductors
Adductor longus
Adductor brevis
Adductor magnus
Different Types of Muscles?
Involuntary controlled by the automatic nervous system (cardiac around the heart and smooth around the vital organs)
Voluntary muscles under our voluntary control/skeletal muscles what we focus on for dance
How do muscles move in pairs?
Concentric contraction
Eccentric contraction
Concentric contraction
Shortening with a force (agonist)
Eccentric contraction
Lengthening while still holding force
antagonist (antagonist)
Muscles in the neck
Attach to front, back and sides of vertebrae producing forward, backward and sideways movement
Sternocleidomastoid
The pectoral girdle
Pectoralis Major
Sternocleidomastoid
long muscle located on either side of neck flexes neck, rotates head laterally flex (tilt) the head to side
Pectoral girdle
muscles that support the shoulder girlde and shoulder joints
One set attaches shoulder girdle to truck of body
Another set joins shoulder girdle to humerus bone
Pectoralis Major
Fan shaped muscle at top of chest
Helps to raise arm (shoulder flexion)
And pulls towards midline (shoulder adduction)
Muscles of Back
Muscles provide strength stability and movement to spinal column
involved in shoulder movement and participate in breathing process
Trapezius
Erector Spinae
Latissimus Dorsi
Teres Major
Teres Minor
Trapezius
Large flat triangular muscle
Back of neck
Steadies the shoulder
Assists the movement of the scapula
Erector Spinae
Three deep muscles running down the side of the spine
Powerful extensor in returning torso erect
Provides control for waist flexion
Latissimus Dorsi
Large flat triangular shaped muscle that attaches from the spine and ribs to the upper arm
Prime mover for arm extension and adduction
Teres Major
Thick rounded muscle extending from the scapula to the humerus
helps to rotate arm and bring it close to the body (adduction)
Teres Minor
Small muscle extending from scapula to the humerus
rotator cuff muscle that helps to stabilise shoulder
Muscles of the Abdomen
Provides muscular casing for the abdominal organs and assist in the compression of these organs during breathing process
External Oblique
Rectus Abdominis
Transverse Abdominis
External Oblique
Outermost abdominal muscle
Supports organs of abdomen
Aids other prime movers in movement of the trunk
Rectus Abdominis
Deep vertical band of muscle on the abdomen segmented horizontally by bands of tendon (6 pack/8 pack)
Flexes trunk
Core stabiliser that pulls ribs down (flat) and stabilises pelvis
Transverse abdominis
inner most layer of the abdominal muscles
Muscles of Arms
Arm muscles work in conjunction with the shoulder and elbow joints to allow wide range of movement: elevation, flexion, extension, abduction, adduction and rotation Deltoid Biceps Triceps Extensor Digitorum
Deltoid
Thick rounded muscles over the shoulder
Prime mover in lifting arm away from body (abduction)
Also involved in rotation, flexion and extension of shoulder and arm
Triceps
Back of the humerus
Prime mover of forearm extension
Biceps
Front of the humerus
Flexes the elbow joint
Extensor Digitorum
Surface muscle at back of forearm
Extends fingers & wrists & abducts (flares) fingers
Muscles of Hips & Legs
Work together to allow movement in hip joint Illiopsoas Gluteal muscles Gluteal minimus Gluteal Medius Gluteal Maximus
Illiopsoas
Composite of two muscles Illiacus attaches from illium Psoas attaches from the lumbar spine Front of hip joint Flexes the thigh and trunk and is important for postural muscles
Gluteus minimus
Deepest and smallest gluteal muscle
Actions same as gluteal minimus
Gluteus Medius
Second layer
Thick muscle extending from the top of hip to top of femur
Stabilises the pelvis
Aids in abduction of leg and in rotation of thigh inwards
Gluteus Maximus
Surface muscle both large and powerful
forms bulk of the buttocks
Acts as a powerful extensor of the hip joint
straightens thigh
involved in abduction and rotation of thigh outward
Quadriceps Muscles
Formed of four seperate parts
Rectus femoris
Vastus Lateralis
Vastus medialis
Vastus intermedius
Starts in the pelvis and upper thigh bone
tendons of four components merge and attach to kneecap & extend to point of attachment on tibia
Rectus Femoris
Surface muscle running vertically down front of thigh
Flexes hip and extends knee