Back muscles: origin, insertion, action & innervation
Iliocostalis: action
Extends the vertebral column
Latissimus dorsi: action
action: adducts, extends the arm
Serratus posterior inferior: action
action: depresses ribs (9-12)
Levator scapulae: action
action: elevates and laterally flexes the scapula
Serratus posterior superior: action
action: elevates ribs (2-5)
Trapezius: action
action: elevates, retracts & rotates the scapula
Rhomboid major: action
action: retract, downwardly rotates the scapula
Rhomboid minor: action
action: retract, downwardly rotates the scapula
Splenius cervicis: action
action: rotates and extends the head
Semispinalis capitis: action
action: rotates, extends head and neck
Splenius capitis: action
action: rotates, extends the head
Which muscles cover the serratus posterior superior muscles?
covered by: Trapezius & Rhomboid muscles
What three back muscles are innervated by the dorsal scapular nerve?
innervated by same nerve: Rhomboid major, Rhomboid minor, Levator Scapulae
Trapezius: innervation
innervation: Accessory nerve
Semispinalis capitis: innervation
innervation: dorsal rami spinal nerve
Splenius capitis: innervation
innervation: dorsal rami spinal nerve
Splenius cervisis: innervation
innervation: dorsal rami spinal nerve
Levator scapulae: innervation
innervation: dorsal scapular nerve
Rhomboid major: innervation
innervation: dorsal scapular nerve
Rhomboid minor: innervation
innervation: dorsal scapular nerve
Latissimus dorsi: innervation
innervation: thoracodorsal nerve
Serratus posterior inferior: innervation
innervation: ventral rami spinal nerve
Serratus posterior superior: innervation
innervation: ventral rami spinal nerve
Trapezius: insertion
insertion: clavicle & scapular spine
Latissimus dorsi: insertion
insertion: intertubercular sulcus of the humerus
Serratus posterior inferior: insertion
insertion: lower border of ribs 9-12
Splenius capitis: insertion
insertion: mastoid process
Longissimus: insertion
insertion: mastoid process of skull; lower 9 ribs
Semispinalis capitis: insertion
insertion: occipital bone
Iliocostalis: insertion
insertion: posterior surface of ribs
Rhomboid major: insertion
insertion: scapula (medial border)
Rhomboid minor: insertion
insertion: scapula (medial border)
Spinalis: insertion
insertion: spinous process of thoracic vertebrae & skull
Splenius cervicis: insertion
insertion: transverse process C1-C4
Serratus posterior superior: insertion
insertion: upper border of ribs 2-5
Levator scapulae: insertion
insertion: upper border of scapula
Trapezius: origin
origin: Occipital bone, spines of all thoracic vertebrae
Serratus posterior superior: origin
origin: SA: Nuchal ligament, C7-T3
Rhomboid major: origin
origin: Spinous process T2-T5
Latissimus dorsi: origin
origin: Spinous process T7-Sacrum, iliac crest
Rectus capitis posterior minor: origin, insertion, action, innervation
origin: posterior tubercle of atlas insertion: occipital bone action: extends the head innervation: suboccipital nerve
Iliocostalis: origin
origin: sacrum
Multifidus: origin, insertion, action, innervation
origin: sacrum insertion: spinous process of L5-C2 action: extends vertebral column innervation: dorsal rami spinal nerve
Splenius cervicis: origin
origin: spines of T1-T6; nuchal ligament
Rectus capitis posterior major: origin, insertion, action, innervation
origin: spinous process C2 insertion: occipital bone action: extends the head innervation: suboccipital nerve
Inferior oblique: origin, insertion, action, innervation
origin: spinous process C2 insertion: transverse process C1 action: rotates the head innervation: suboccipital nerve
Rhomboid minor: origin
origin: spinous process of T1
Splenius capitis : origin
origin: spinous processes of T1-T6; nuchal ligament
Serratus posterior inferior: origin
origin: spinous processes of T11-L3
Superior oblique: origin, insertion, action, innervation
origin: transverse process C1 insertion: occipital bone action: extends the head innervation: suboccipital nerve
Levator scapulae: origin
origin: transverse process C1-C4
Semispinalis capitis: origin
origin: transverse process of T1-T6
Rotatores: origin, insertion, action, innervation
origin: transverse process of vertebrae insertion: spinous process of superior vertebrae action: extends vertebral column innervation: dorsal rami spinal nerve
Lavatories costarum: origin, insertion, action, innervation
origin: transverse processes of C7-T11 insertion: the rib inferior to each vertebrae action: elevates the ribs innervation: dorsal rami spinal nerve
Which two back muscles retract, rotate, and fix the scapula to the body wall?
same action: Rhomboid major & Rhomboid minor
The scapula is the insertion point for these two back muscles
same insertion point: Rhomboid minor, Rhomboid major
These two back muscles have the same origin (C7-T3/4 & nuchal ligament), action (head & neck extension, ipsilateral flection & rotation) and innervation (dorsal rami spinal nerve).
same origin, action & innervation: Splenius capitis & Splenius cervisis
