Superficial Back Muscles

Question 1

Latissimus Dorsi Origen and Insertion

Answer 1

Origen:

• Spinous process T7-T12 Directly
• Spinous process Lumbar Indirectly
• Thoraco Fascia (aponeurotic membrane)
• Posterior 1/3 of Iliac crest through Thoraco Fascia

Costal Part:

• Join superficial part
• Goes convergly passes inferior angle of scapula
• Parallel to Teres Major

Insertion:

• Intertubercular groove of the humerus bone

Question 2

Latissimus Dorsi Action

Answer 2

• Depresses the elevated limb
• Middle rotation
• Abduction
• Hyperextension

Costal attachment:

• Slowly contraction elevates the lower ribs (Inspiratory muscle)
• Sudden contration compresses thorax (caughing reflex)

Question 3

Latissimus Dorsi Innervation

Answer 3

Thoracodorsal Nerve

Question 4

Latissimus Dorsi

Answer 4

Superficial Layer

With Costal Part with Teres Major builds the Posterior axillary fold

Question 5

Levator Scapulae

Answer 5

Question 6

Rhomboid Major

Answer 6

Intermediate Layer

Flat thin

Creates a gap to allow vessles to pass through

Question 7

Rhomboid Minor

Answer 7

Intermediate Layer

Flat thin

Creates a gap to allow vessles to pass through

Question 8

Serratus Posterior Inferior

Answer 8

Question 9

Serratus Posterior Superior

Answer 9

Question 10

Trapezius

Answer 10

Superficial Layer

Rhomboid Speculum

• Between spinous process C5-T1 form rhomboid aponeurotic tendinous structure
• Palpable
• Stabilization of stabilisation of extended vertebral column

Question 11

Trapezius Innervation

Answer 11

Accessory Nerve

Question 12

Trapezius Origen and Insertion

Answer 12

Originates:

• External Occipital protuberance and superior nuchal line
• To T12

Insertion Decending Part:

• Acromium end of clavicle

Insertion Horizontal Part:

• Acromium
• Lateral part of scapular spine

Insertion Acceding Part:

• Medial part of scapula spine

Question 13

Trapezius Action

Answer 13

Decending Part:

• Elevates Clavicle

Horizontal Part:

• Retracts Scapula

Accending Part:

• Rotates Scapula
• Depresses Scapula

Question 14

Rhomboid Minor Origen and Insertion

Answer 14

Origen:

• Spinous process C6, C7

Insertion:

• Superior 1/3 medial border of scapula

Question 15

Rhomboid Major Origen and Insertion

Answer 15

Origen:

• T1 - T4

Insertion:

• Inferior 2/3 medial border of scapula

Question 16

Rhomboid Minor Action

Answer 16

Retration of scapula

Question 17

Rhomboid Major Action

Answer 17

Retration of scapula

Rotation of scapula

Question 18

Rhomboid Major Innervation

Answer 18

Dorsal Scapular Nerve

Question 19

Rhomboid Minor Innervation

Answer 19

Dorsal Scapular Nerve