Vertebral Column

Question 1

Trapezius

Origin

Insertion

Answer 1

Origin:

• External occipital protuberance
• Nuchal ligament
• Medial superior nuchal line
• Spinous processes C7-T12

Insertion:

• Pos. lateral 1/3 of clavicle, acromion process, spine of scapula

Question 2

Trapezius

Actions

Innervation

Answer 2

Actions:

• Retraction
• Sup. Rotation
• Elevation
• Depression

Innervation:

• Motor: Spinal accessory n. (CXI)
• Sensory: C3-4

Question 3

Latissimus dorsi

Origin

Insertion

Answer 3

Origin:

• Spinous proceses T6-T12
• Thoracolumbar fascia (to the lumbar spinous processes)
• Iliac crest
• Inferior 3/4 ribs

Insertion:

• Floor of the bicipital groove

Question 4

Latissimus dorsi

Actions

Innervation

Answer 4

Actions:

• Adduction;
• Medial rotation;
• Extension of the arm at the glenohumeral joint

Innervation:

• Thoracodorsal n. (C7, C8)

Question 5

Rhomboid Major

Origin

Insertion

Answer 5

Origin:

• Spinous processes T2-T5

Insertion:

• Pos. medial scapula; from root of spine to inferior angle

Question 6

Rhomboid Major

Actions

Innervation

Answer 6

Actions:

• Elevates and retracts the scapula

Innervation:

• Dorsal scapular n.
• (C5 of brachial plexus)

Question 7

Rhomboid Minor

Origin

Insertion

Answer 7

Origin:

• Nuchal ligament
• Spinous processes C7-T1

Insertion:

• Superior to rhomboid major, at the root of spine

Question 8

Rhomboid Minor

Actions

Innervation

Answer 8

Actions:

• Elevates and retracts the scapula

Innervation:

• Dorsal scapular n.

Question 9

Levator Scapulae

Origin

Insertion

Answer 9

Origin:

• Transverse processes C1-C2
• Pos. tubercles of transverse processes of C3-C4

Insertion:

• Pos. surface of medial scapula from superior angle to root of spine

Question 10

Levator Scapulae

Actions

Innervation

Answer 10

Actions:

• Elevates scapula

Innervation:

• C3-C4
• C5 from dorsal scapular n.

Question 11

Sternocleidomastoid

Origin

Insertion

Answer 11

Origin:

• Manubrium Sterni
• Medial portion of clavicle

Insertion:

• Mastoid process of the temporal bone
• Superior nuchal line

Question 12

Sternocleidomastoid

Actions

Innervation

Answer 12

Actions:

• UNILATERAL:
  
  • neck rotation to opposite side of neck
  • neck flexion to same side
• BILATERAL:
  
  • neck flexion raises sternum
  • assists in forced expiration

Innervation:

• MOTOR: CN XI spinal accessory
• SENSORY: Cervical plexus