Muscle of the Back

Question 1

What are the Heads of the Trapezius Muscle?

Answer 1

There is an Upper, Middle and lower head to this muscle.

Question 2

Where is the Trapezius located?

Answer 2

This muscle lies superficially along the upper back and neck.

Question 3

What is the (O) and (I) for the Upper head of the Trap?

Answer 3

(O) EOP, Medial portion of the Superior Nuchal line, Ligamentum Nuchae and Spinous process of C7 to T12.
(I) Lateral 1/3 of the clavicle, Acromion and Spine of the Scapula.

Question 4

What is the Action for the Upper portion of the Trap?

Answer 4

Unilaterally: Ipsilateral lateral Flexion of the head and Neck. Contralateral rotation of the head and neck.
Elevation of the Scapula.
Upwardly rotate the Scapula.

Bilaterally: Extension of the Head and Neck.

Question 5

What is the Action for the Middle portion of the Trap?

Answer 5

Adduction of the Scapula, Stabilization of the Scapula.

Question 6

What is the Action for the Lower portion of the Trap?

Answer 6

Depression of the Scapula, Upwardly rotate Scapula.

Question 7

What is the Nerve of the Trap?

Answer 7

Spinal portion of cranial nerve XI and ventral ramus C2, 3, 4.

Question 8

Where is the Latissimus Dorsi located?

Answer 8

Located on the Lower to middle back reaching to the Anterior portion of the GH joint.

Question 9

What is the (O) and (I) of the Latissimus Dorsi?

Answer 9

(O) Spinous process of T6-12 and ribs 8-12, Thoracolumbar Aponeurosis and Posterior Iliac crest.
(I) Interubecular Groove of the Humerus.

Question 10

What is the Action of the Latissimus Dorsi?

Answer 10

Extends the GH joint, Abduction of the GH joint, Medial rotates the GH joint.

Question 11

What is the Nerve of the Latissimus Dorsi?

Answer 11

Thoracodorsal C6, 7, 8.

Question 12

What is Teres Major?

Answer 12

This muscle is lats little helper as it does the same actions as the Lat muscle.

Question 13

What is the (O) and (I) for the Teres Major?

Answer 13

(O) Inferior angle and lower 1/3 of lateral border of the Scapula.
(I) Crest of the lesser tubercle of the Humerus.

Question 14

What is the Action of the Teres Major?

Answer 14

Extension of the GH joint, Adduction of the GH joint, Medial rotation of the Gh joint.

Question 15

What is the nerve associated with the Teres Major?

Answer 15

Lower sub scapular C5, 6, 7.

Question 16

Where is the Splenius Capits and Cervicis Located?

Answer 16

Along the Upper back and neck towards the base of the skull.

Question 17

What is the Action of the Splenius Capitis & Cervicis?

Answer 17

Unilaterally: Ipsilateral Rotation of the head and neck.
Ipsilateral lateral flexion of the head and neck.

Bilaterally: Extension of the Head and Neck.

Question 18

What is the (O) and (I) for the Splenius Capitis?

Answer 18

(O) Inferior 1/2 of LIgamentum nuchae and Spinous processes of C7 to T4.
(I) Mastoid process and lateral portion of Superior Nuchal line.

Question 19

What is the (O) and (I) for the Splenius Cirvicis?

Answer 19

(O) Spinous processes of T3 to T6.

(I) Transverse process of C1 to C3.

Question 20

What is the Nerve Associated with Splenius Capt and Cervicis?

Answer 20

Cervical.

Question 21

What is the Action of the Serratus Posterior-Superior?

Answer 21

helps with Elevation of the Rib cage during Inhalation.

Question 22

What is the Action of the Serratus Posterior-Inferior?

Answer 22

Helps with Depression of the Rib cage during inhalation.

Question 23

What is the (O) and (I) of the Serratus Posterior-Superior?

Answer 23

(O) Spinous processes of C7 - T3.

(I) Posterior Surface of 2nd - 5th ribs.

Question 24

What is the (O) and (I) of the Serratus Posterior_inferior?

Answer 24

(O) Spinous processes of T12 - L3.

(I) Posterior Surface 9th - 12th ribs.

Question 25

What is the nerve Associated with Serratis Posterior-Superior?

Answer 25

T1 - 4.

Question 26

What is the nerve associated with Serratus Posterior-Inferior?

Answer 26

T9 - 12.