Muscles of the Vertebral Column

Question 1

Illiocostalis group
Erector Spinae
illio-illium
cost-rib

Answer 1

bilateral - extends neck and vertebral column; maintains posture
unilateral a- Laterally flexes vertebral column
O: illum, sacrum, lumbar vertebrae
I: Ribs, cervical vertebrae

Question 2

Longissimus group
Erector Spinae

Answer 2

bilateral a: extends neck and vertebral column: maintains posture
unilateral a: Rotates head and laterally flexes vertebral column
O: Illium, Sacrum and lumbar vertebrae
A: Mastoid Process, Cervical and thoracic vertebrae

Question 3

Spinalis Group
Erector Spinae

Answer 3

Bilateral A: Extends Neck and vertebral column; maintains posture
Unilateral A: Laterally flexes vertebral column
O: C7 vertebrae and lumbar vertebrae
I:Axis and thoracic vertebrae

Question 4

Multifidus
(Transversospinalis Group)

Answer 4

Bilateral A: Extends Vertebral Column
Unilateral A: Rotates vertebral column to opposite side
O:Sacrum and each vertebrae
I: Vertebrae Superior to origin

Question 5

Semispinalis group
(Transversospinalis Group)

Answer 5

Bilateral A: Extends vertebral column
Unilateral A: Laterally flexes vertebral column and neck
O:cervical and thoracic vertebrae
I:Occipital bone, cervical, and thoracic vertebrae

Question 6

Quadratus Lumborum
(Spinal Extensors and Lateral Flexors)

Answer 6

Bilateral A: Extends Vertebral Column
Unilateral A: Laterally flexes vertebral column
O: Illium
I: 12th rib, lumbar vertebrae