Lesson 7B - Muscles of the deep back & neck

which muscle, origin, insertion, innervation, and action is this

Erector Spinae: Iliocostalis (cervicis)

ORIGIN; superior 6 ribs

INSERTION; TP of C4-C6

ACTION; extends and maintains erect posture of spine, individually laterally flexes vertebral column of respective region

INNERVATION; spinal nerves

which muscle, origin, insertion, innervation, and action is this

Erector Spinae: Iliocostalis (thoracis)

ORIGIN; inferior 6 ribs

INSERTION; superior 6 ribs

ACTION; extends and maintains erect posture of spine, individually laterally flexes vertebral column of respective region

INNERVATION; spinal nerves

which muscle, origin, insertion, innervation, and action is this

Erector Spinae: Iliocostalis (lumborum)

ORIGIN; iliac crest

INSERTION; inferior 6 ribs

ACTION; extends and maintains erect posture of spine, individually laterally flexes vertebral column of respective region

INNERVATION; spinal nerve

which muscle, origin, insertion, innervation, and action is this

Erector Spinae: Longissimus (capitis)

ORIGIN; TP of T1-T4 vertebrae and articular processes of C4-C7

INSERTION; mastoid process

ACTION; Together: Extend vertebral column at respective region Singly: Laterally flex vertebral column of respective region

INNERVATION; spinal nerve

which muscle, origin, insertion, innervation, and action is this

Erector Spinae: Longissimus (cervicis)

ORIGIN; TP of T4-T5

INSERTION; TP of C2-C6

ACTION; Together: Extend vertebral column at respective region Singly: Laterally flex vertebral column of respective region

INNERVATION; spinal nerves

which muscle, origin, insertion, innervation, and action is this

Erector Spinae: Longissimus (thoracis)

ORIGIN; TP of L1-L5

INSERTION; TP of thoracic and lumbar vertebrae, ribs 9 and 10

ACTION; Together: Extend vertebral column at respective region Singly: Laterally flex vertebral column of respective region

INNERVATION; spinal nerves

which muscle, origin, insertion, innervation, and action is this

Erector Spinae: Spinalis (capitis)

ORIGIN; arises with semispinalis capitis

INSERTION; occipital bone

ACTION; Together- Extend vertebral column at respective regions

INNERVATION; spinal nerves

which muscle, origin, insertion, innervation, and action is this

Erector Spinae: Spinalis (cervicis)

ORIGIN; ligamentum nuchae and spinous process of C7

INSERTION; spinous process of axis

ACTION; Together- Extend vertebral column at respective regions

INNERVATION; spinal nerves

which muscle, origin, insertion, innervation, and action is this

Erector Spinae: Spinalis (thoracis)

ORIGIN; spinous processes of superior lumbar and inferior thoracic vertebrae

INSERTION; spinous process of thoracic vertebrae

ACTION; Together- Extend vertebral column at respective regions

INNERVATION; spinal nerves

which muscle, origin, insertion, innervation, and action is this

Transversospinalis / Semispinalis (capitis)

ORIGIN; TP of C7 and T1-T7 and AP of C4-C6

INSERTION; occipital bone

ACTION; Together: Extend vertebral column at respective region - Singly: Rotate head to the opposite side

INNERVATION; spinal nerve

which muscle, origin, insertion, innervation, and action is this

Transversospinalis / Semispinalis (cervicis)

ORIGIN; TP of T1-T6

INSERTION; spinous processes C1-5

ACTION; Extend vertebral column at respective region - Singly: Rotate head to the opposite side

INNERVATION; spinal nerves

which muscle, origin, insertion, innervation, and action is this

Transversospinalis / Semispinalis (thoracis)

ORIGIN; TP of T6-T10

INSERTION; spinous processes of C6-C7 and T1-T4

ACTION; Extend vertebral column at respective region - Singly: Rotate head to the opposite side

INNERVATION; spinal nerves

which muscle, origin, insertion, innervation, and action is this

multifidis

ORIGIN; sacrum, ilim, transverse processes of lumbar, thoracic, and C4-C7

INSERTION; spinous processes of a more superior vertebra

ACTION; Together: Extend vertebral column - Singly: Laterally flex vertebral column and rotate head to opposite side

INNERVATION; spinal nerves

which muscle, origin, insertion, innervation, and action is this

rotatores

ORIGIN; transverse processes of all vertebrae

INSERTION; spinous process of vertebra superior to the one of the origin

ACTION; Together: Extend Vertebral Column Singly: Rotate vertebral column to the opposite side

INNERVATION; spinal nerves

which muscle, origin, insertion, innervation, and action is this

Scalenes Anterior

ORIGIN; transverse processes C3-C6

INSERTION; first rib

ACTION; Together: Flex neck and Raises 1st rib during deep inhalation Singly: Laterally flex and rotate neck to the same side

INNERVATION; cervical nerves

which muscle, origin, insertion, innervation, and action is this

Scalenes Middle

ORIGIN; transverse processes C2-C7

INSERTION; first rib

ACTION; Together: Flex neck and Raises 1st rib during deep inhalation Singly: Laterally flex and rotate neck to the same side

INNERVATION; cervical nerves

which muscle, origin, insertion, innervation, and action is this

Scalenes Posterior

ORIGIN; transverse processes C4-C6

INSERTION; second rib

ACTION; Together: Flex neck and Raises 2nd ribs during deep inhalation Singly: Laterally flex and rotate neck to the opposite side

INNERVATION; cervical nerves

which muscle, origin, insertion, innervation, and action is this

Sternocleidomastoid

ORIGIN; Sternum and Clavicle

INSERTION; Mastoid Process

ACTION; Together: Flex cervical portion of vertebral column, extend head, and elevate sternum during forced inhalation Singly: Laterally flex and rotate neck to the opposite side

INNERVATION; Spinal Accessory

which muscle, origin, insertion, innervation, and action is this

Platysma

ORIGIN; Fascia over deltoid and pectoralis major muscles

INSERTION; Mandible and skin of lower face

ACTION; Depresses mandible, depresses and draws lower lip laterally, draws up skin of chest

INNERVATION; facial nerve