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MUSCULAR SYSTEM: Marylen Ventura (BODY MOVEMENT TERMINOLOGY (flexion-…
MUSCULAR SYSTEM: Marylen Ventura
MAJOR FUNCTIONS OF THE MUSCULAR SYSTEM:
THERMOGENESIS- the made from contraction helps with homeostasis
MOTION - change in body position either voluntary or in voluntary
POSTURE- maintains posture and regulates organ volume
NAME OF THE MUSCLES + DESCRIPTIONS
HEAD AND NECK REGION
TEMPORAL: F: closes jaw L: mandible
ORBICULARIS ORIS: F: draw lips together L: encircle lips
FRONTAL: F: raises eyebrow L: skin of eyebrow
ZYGOMATICUS: F: raises corners of the mouth and lips L: zygomatic
ORBICULARIS: F: closes eyes L: maxilla and frontal bone
UPPER LIMBS
DELTOID: F: abducts the arm L: humerus
TRICEPS BRANCHII: F: extends L: scapula and ulna
BICEPS BRANCHII: F: flexes arm L: radius
LATISSIMUS DORSI: F: extends and helps abduct upper arm L: humerus
PECTORALIS MAJOR: F: flexes and helps abduct upper arm L: humerus
TORSO
EXTERNAL OBLIQUE: F: compresses abdominal L: midline of abdomen
INTERNAL OBLIQUE: F: compresses abdominal L: midline of abdominal
RECTUS ABDOMINIS: F: flexes trunk L: lower rib cage
TRANSVERSUS: F: compresses abdominal L: midline of abdomen
LOWER LIMBS
LLIOPSOAS: F: flexes truck and thigh L: femur
SARTORIUS: F: flexes thigh and rotates lower leg L: tibia
GLUTEUS MAXIMUS: F: extends thigh L: femur
PECTINEUS: F: adducts thigh L: femur
GRACILIS: F: adducts thigh L: tibia
ADDUCTOR LONGUS: F: adducts thigh L: femur
3 TYPES OF MUSCLE TISSUES
SKELETAL: F: support, movement and homeostasis
CARDIAC: F: keeps your heart pumping its an involuntary movement
SMOOTH: F: helps digest food and keeps the air flowing in the lungs
BODY MOVEMENT TERMINOLOGY
flexion- movement that decreases angle of joint
extension- movement that increases angles of joint
hypertension- extension beyond 180 degrees
rotation- movement of the bone around a longitude axis
abduction - movement of a limb moving away from the midline
circumduction- proximal end of a limb
dorisflexion- lifting the superior surface of the foot towards the shin
plantar flexion - pointing toe
inversion- a turn of the sole of the foot medially
eversion- the turn of the sole of the foot laterally
supination- forearm rotates laterally so the palm faces anteriorly
pronation- forearm rotates medially so the palm faces posteriorly
opposition- movement of the thumb to touch tips of the other fingers
structure and organization of the skeletal muslce
Each muscle has many thick and thin filaments and they usually overlap to form slanted segments called sarcomeres. During a contraction the thin filaments are pulled towards the middle of each sarcomere making the muscle shorten. When the thick and thin filaments contract they create a dark pattern with striations.
SLIDING FILAMENT THEORY!!!!!!!!!
