Test 4

Question 0

Illiocostalis thoracis

Answer 0

Origin: ribs 7-12
Insertion: ribs 1-6
Action: bilaterally, muscles of each region extend and maintain erect posture of vertebral column of their respective regions; laterally, laterally flex vertebral column of their respective region to same side as contracting muscles

Question 1

Iliocostalis cervicis

Answer 1

Origin: ribs 1-6
Insertion: transverse process of C4-C6
Action: bilaterally, muscles of each region extend and maintain erect posture of vertebral column of their respective regions; laterally, laterally flex vertebral column of their respective region to same side as contracting muscles

Question 2

Illocostalis lumborum

Answer 2

Origin: iliac crest
Insertion: ribs 7-12
Action: bilaterally, muscles of each region extend and maintain erect posture of vertebral column of their respective regions; laterally, laterally flex vertebral column of their respective region to same side as contracting muscles

Question 3

Longissimus capitis

Answer 3

Origin: C4-T4
Insertion: mastoid process of temporal bone
Action: bilaterally, both longissimus capitis muscles extend head and extend vertebral column; singly, rotate head to same side as contracting muscle.

Question 4

Longissimus cervicis

Answer 4

Origin: transverse process of T4-T5
Insertion: transverse process of C2-C6
Action: together, longissimus cervicis and both longissimus thoracis muscles extend vertebral column of their respective regions; singly, laterally flex vertebral column of their respective regions

Question 5

Longissimus thoracis

Answer 5

Origin: transverse process of lumbar vertebrae
Insertion: transverse process of all thoracic and superior lumbar vertebrae
Action: together, longissimus cervicis and both longissimus thoracis muscles extend vertebral column of their respective regions; singly, laterally flex vertebral column of their respective

Question 6

Spinalis capitis

Answer 6

Origin: often very small. Arise with semispinalis capitis
Insertion: occipital bone
Action: together, muscles of each region extend vertebral column of their respective regions and extend head

Question 7

Spinalis cervicis

Answer 7

Origin: ligamentum nuchae and spinous process of C7
Insertion: spinous process of axis(C2)
Action: together, muscles of each region extend vertebral column of their respective regions and extend head

Question 8

Spinalis thoracis

Answer 8

Origin: spinous process of L2-T10
Insertion: spinous process of superior thoracic vertebrae
Action: together, muscles of each region extend vertebral column of their respective regions and extend head