Muscles Flashcards
The insertion of the erector spinae is….
The posterior aspects of ribs, thoracic and cervical transverse processes, the mastoid process
The erector spinae originates from…
The posterior aspect of the iliac crest, the spinous processes of vertebrae
The action/function of the erector spinae is…
Maintain posture, extension of trunk and abducts trunk.
The sternocleidomastoid originates from….
Medial 1/3 of the clavicle and the superior aspect of the sternum
The sternocleidomastoid inserts on….
The mastoid process
The action and function of the sternocleidomastoid is…
Flexing at the neck and flexion and rotation at the neck
The origin of the lateral rotators is…
The outer and inner surface of the pelvis near the obturator foramen
Lateral rotators insert at…
The greater trochanter of the femur
The action the lateral rotators perform is…
Lateral rotation of the hip
Ligaments connect…..
Bone to bone
Tendons connect….
Muscle to bone
The pectoralis major originates at…
- The medial half of the clavicle 2. The length of the sternum
The pectoralis major inserts at…
The bicepital groove of the humerus
The function of the pectoralis major is…
- Addiction of the shoulder 2. Medial rotation at the shoulder 3. Horizontal flexion at shoulder and 4. Clavicular head only: flexion at the shoulder
The rhomboids originate at…
The upper 5 thoracic spinous processes
The rhomboid inserts at…
The vertebral border of the scapula (between the spine and the lateral scapula)!
The action and function of the RHOMBOID is….
- Retract the scapula 2. Rotated the glenoid fossa down (therefore allows extension)
The INTERNAL OBLIQUES originate at…
At the lateral 1/2 of the inguinal ligament
What direction do the fibres of the INTERNAL OBLIQUES run at?
90 degrees
INTERNAL OBLIQUES insert at…
- The coastal cartilage of the lower 4 ribs 2. Linea alba
Function of the INTERNAL OBLIQUES is….
- Stabilize pelvis 2. Aid in expulsive movements 3. Protect and hold in abdominal viscera 4. Rotation of trunk
