Question

was wondering if someone could help fill in this chart. there's no word bank or anything

Lab 9: Axial Muscles of the Head, Neck and Trunk 7-12. Complete the following table with at least one answer in each box (i.e. one action, one synergist, etc). Muscle Action Synergists Antagonists Origin Insertion Medial border of scapula None Zygomatic arch Closes lips None None Ribs 1-8 Elevates scapula, abducts Jand rotates neck INone Temporal fossa Rectus Jabdominis Closes eyelid None None Serratus anterior None None Mastoid process Inspiration and expiration None None None Subcutaneous tissue of eyebrows

Answer 1

1. Levator scapule -

• Action - Elevation of scapula
• synergist - Trapezius (middle part), Rhomboid major and minor.
• antagonist - Pectoralis major and minor, Serratus anterior, Subclavius
• Origin - transverse processes of the atlas and axis, as well as the posterior tubercles of the 3rd-4th cervical vertebrae
• insertion - medial border of the scapula.

2. Masseter muscle

• Action - elevation of mandible
• synergist - none
• antagonist - none
• Origin - maxillary process of the zygomatic bone
• insertion - mandible bone

3.. Orbicularis oris

• Action - closes lip
• synergist - none
• antagonist - levator papabrae
• Origin - mid-line of the mandible and maxilla.
• insertion - lips

4. serratus anterior

• Action - protacts and stabilises scapula
• synergist - pectoralis major and minor
• antagonist - rhomboid major and minor
• Origin - ribs 1 to 8
• insertion - scapula

5.Trapezius

• Action - elevates scapula
• synergist - levator scapulae
• antagonist - none
• Origin -  external occipital protruberance
• insertion -  lateral third of clavicle, acromion, and spine of scapula

6. Temporal muscle

• Action - mastication
• synergist - masseter
• antagonist - mylohoid
• Origin - tempral fossa
• insertion -mandible and retromolar fossa

7. Rectus abdominis

• Action - flexion of spine
• synergist - Diaphragm
• antagonist - Interspinales
• Origin - crest of the pubis
• insertion - costal cartilage of the fifth through seventh ribs.

8. Orbicularis oculi

• Action - closes eyelid
• synergist - none
• antagonist - none
• Origin - orbital margin
• insertion - eye socket

9.Pectoralis major

• Action - Adduction and rotation of shoulder
• synergist - pectoralis minor
• antagonist - serratus anterior
• Origin - clavicle and sternum
• insertion - Lateral lip of the bicipital groove of the humerus

10. Sternocleidomastoid

• Action - flexion of neck
• synergist - none
• antagonist - none
• Origin -  the anterior surface of the upper sternum and the clavicle.
• insertion - mastoid process

11. diaphragm

• Action - inspiration and expiration
• synergist - none
• antagonist - none
• Origin - It has 3 origins i.e. Vertebral:crura from bodies of L1, 2 (left), L1-3 (right). Costal: medial and lateral arcuate ligs, inner aspect of lower six ribs . Sternal: two slips from posterior aspect of xiphoid
• insertion - Central tendon

12. Depressor supercilli

• Action - depression of eyebrow
• synergist - none
• antagonist - levator palpebrae
• Origin - fibers of orbicularis oculi
• insertion - subcutaneous tissue of eyebrow