Muscles
Human Trapezius Muscles:
-it's on the posterior side of the body superior to the latissimus dorsi
-it's shaped as a trapezoid and medial to the lattissimus dorsi
-insertion is the lateral clavicle, acromion, and spine of the scapula
-the origin is the nuchal ligament, occipital protuberance, spinous process C7-T3-action is it elevates and upwardly rotates the scapula, it also extends neck
Human Deltoid Muscles:
-origin is the anterior sufrace of the lateral clavicle, and the acromion process of the spine of the scapula
-insertion is the deltioid tuberoisty of the humerus
-action of the deltoid is it flexes and medially rotates arm of the shoulder, it also abducts the arms from the body
-deltoid is the shoulder
Human Latissimus Dorsi Muscles:
- origin is the latissimus dorsi are the spines of lower six thoracic vertabrae, lumbar vertabrae, and the iliac crest
-insertion is the intertubercular, grooves of the humerus
-action is the abduction, medial rotation and extension of the arm
-latissumus dorsi are also called "Lats"
Human Pectoralis Major & Minor Muscles:
-origin of the minor is the anterior surface of the sternal end of rib 3-5
-origin of the major is the calvicle head
-insertion of the minor is the coracoid process of the scapula
-insertion of the major is the intertubercular groove of the humerus and crest of the greater tubercle
-action of both is it flexes arm at the shoulder, extends the arm at the shoulder, and it rotates and adducts arm at the shoulder
Human External & Internal Oblique Muscles:
-origin of the internal oblique are the anterior iliac crest, lateral half of the inguinal ligament, and the thoracolumbar fascia
-insertion of the internal are the costal cartilage of the ribs 8-12 and the abdominal aponeurosis to linea alba
-action of the internal are that it flexes the vertebral column, it rotates vertebral column, it laterally flexes the vertebral column, and compresses the abdomen
-origin of the external oblique are the surface area of rib 5-12
-insertion of the external are the anterior iliac crest and abdominal aponeurosis to linea alba
-action of external obliques are that it flexes vertebral column, rotates vertebral column, it laterally flexes the vertebral column, and compresses the abdomen
Human Rectus Abdominus & Transverse Abdominus Muscles:
-origin of the rectus abdominus are the pubic crest and symphysis pubis
-insertion of the rectus abdominus are the costal cartillage of ribs 5-7 and the xiphoid process of the sternum
-action of the rectus is that it flexes the vertebral column and compresses the abdomen
-origin of the transverse are the anterior iliac crests, the lateral half of the inguinal ligament, thoracolumbar fascia and the cartilage ribs of 6-12
-insertion of the transverse are the abdominal aponeurosis to linea alba, the xiphoid process and the pubic symphysis
-action of transverse are compressing the abdomen
-it's on the posterior side of the body superior to the latissimus dorsi
-it's shaped as a trapezoid and medial to the lattissimus dorsi
-insertion is the lateral clavicle, acromion, and spine of the scapula
-the origin is the nuchal ligament, occipital protuberance, spinous process C7-T3-action is it elevates and upwardly rotates the scapula, it also extends neck
Human Deltoid Muscles:
-origin is the anterior sufrace of the lateral clavicle, and the acromion process of the spine of the scapula
-insertion is the deltioid tuberoisty of the humerus
-action of the deltoid is it flexes and medially rotates arm of the shoulder, it also abducts the arms from the body
-deltoid is the shoulder
Human Latissimus Dorsi Muscles:
- origin is the latissimus dorsi are the spines of lower six thoracic vertabrae, lumbar vertabrae, and the iliac crest
-insertion is the intertubercular, grooves of the humerus
-action is the abduction, medial rotation and extension of the arm
-latissumus dorsi are also called "Lats"
Human Pectoralis Major & Minor Muscles:
-origin of the minor is the anterior surface of the sternal end of rib 3-5
-origin of the major is the calvicle head
-insertion of the minor is the coracoid process of the scapula
-insertion of the major is the intertubercular groove of the humerus and crest of the greater tubercle
-action of both is it flexes arm at the shoulder, extends the arm at the shoulder, and it rotates and adducts arm at the shoulder
Human External & Internal Oblique Muscles:
-origin of the internal oblique are the anterior iliac crest, lateral half of the inguinal ligament, and the thoracolumbar fascia
-insertion of the internal are the costal cartilage of the ribs 8-12 and the abdominal aponeurosis to linea alba
-action of the internal are that it flexes the vertebral column, it rotates vertebral column, it laterally flexes the vertebral column, and compresses the abdomen
-origin of the external oblique are the surface area of rib 5-12
-insertion of the external are the anterior iliac crest and abdominal aponeurosis to linea alba
-action of external obliques are that it flexes vertebral column, rotates vertebral column, it laterally flexes the vertebral column, and compresses the abdomen
Human Rectus Abdominus & Transverse Abdominus Muscles:
-origin of the rectus abdominus are the pubic crest and symphysis pubis
-insertion of the rectus abdominus are the costal cartillage of ribs 5-7 and the xiphoid process of the sternum
-action of the rectus is that it flexes the vertebral column and compresses the abdomen
-origin of the transverse are the anterior iliac crests, the lateral half of the inguinal ligament, thoracolumbar fascia and the cartilage ribs of 6-12
-insertion of the transverse are the abdominal aponeurosis to linea alba, the xiphoid process and the pubic symphysis
-action of transverse are compressing the abdomen