Superficial & Deep Back Flashcards
which muscles of the back are also known as transversospinalis?
semispinalis capitis & cervicis
multifidus & rotatores
Serratus Posterior Superior
origin
insertion
action
supply
origin = spinous processes C7-T3
insertion = superior rib 2-4
action = elevate upper ribs (inhalation)
supply = 1st 4 intercostal nerves & vessels
Rotatores
origin
insertion
action
supply
origin = transverse processes
insertion = spinous processes
action = rotate spine
supply = dorsal rami, intercostal vessels
This muscle depresses the rib cage
serratus posterior inferior
Identify 1-2.
- Rhomboid Minor
- Rhomboid Major
Identify.
Levator Scapulae
Multifidus
origin
insertion
action
supply
origin = sacrum, lower transverse processes
insertion = spinous processes
action = laterally flex, rotate spine
supply = dorsal rami, lumbar vessels
This can become a site of lumbar hernia.
Lumbar Triangle
which nerves join with CN XI to supply proprioception sensation to trapezius?
ventral rami C3-C4
Identify.
Triangle of ascultation
Identify.
Lumbar Triangle
Identify.
Serratus Anterior
Identify 1-5.
- Trapezius
- Latissimus Dorsi
- Levator Scapulae
- Rhomboid Minor
- Rhomboid Major
Identify.
Multifidus
Identify 1-2
- Serratus posterior inferior
- Serratus posterior superior
which muscle of the back is also known as spinotransversus?
splenius capitis & cervicis
Identify.
Rotatores
What are boundaries of Triangle of Ascultation
superior = trapezius
inferior = latissimus dorsi
lateral = rhomboid major
floor = 6th intercostal space
where do you listen to internal thoracic sounds with a stethoscope?
Triangle of Ascultation
between 6th & 7th ribs- 6th intercostal space
Identify.
Triangle of ascultation
This muscle runs from transverse processes to ribs, is minor elevator of ribs during inhalation.
Levatores costarum
this muscle raises the rib cage
serratus posterior superior
Seratus Posterior Inferior
origin
insertion
action
supply
origin = spinous processes T11-L2
insertion = inferior ribs 8-12
action = depress lower ribs (exhalation
supply = last 4 intercostal nerves & vessels
Borders of Lumbar Triangle?
Medial = latissimus dorsi
Lateral = external oblique
Inferior = iliac crest
Floor = internal oblique
superficial muscles of the back?
trapezius latissimus dorsi rhomboid major/minor levator scapulae
Serratus Anterior
origin
insertion
action
supply
origin = 1st 8 ribs
insertion = anterior medial scapula
action = protract scapula, hold it to body wall
supply = long thoracic n, lateral thoracic a/v
which muscles of the back are supplied by ventral rami? by dorsal rami?
ventral rami = superficial & intermediate dorsal rami = deep
Trapezius: origin inserstion action supply
origin = superior nuchal line, spinous processes of C7-T12 insertion = clavicle, acromion, spine of scapula action = elevate, depress, retract scapula supply = CN XI (accessory n), transverse cervical a/v
Identify.
Latissimus Dorsi
transverse cervical artery + venous supply + CN XI make up the…
subtrapezial plexus
This muscle lies between transverse processes, is a minor lateral flexor of the spine.
Intertransversarius
This muscle lies between spinous processes, and is a minor extensor of the spine.
Interspinalis
which muscle of the back is also known as sacrospinalis?
erector spinae
Semispinalis Capitis & cervicis
origin
insertion
action
supply
origin = upper thoracic transverse processes
insertion (capitis) = occipital bone insertion (cervicis) = upper cervical spines
action = extend head/neck
supply = dorsal rami, deep cervical vessels
Rhomboid Major/Minor Origin Insertion Action Supply
origin = spinous processes C7-T5 insertion = medial scapula action = retract scapula supply = dorsal scapular n/a/v
Splenius capitis & cervicis
origin
insertion
action
supply
origin = nuchal ligament, upper spinous processes
insertion (capitis) = occipital bone/ mastoid process insertion (cervicis) = upper cervical transverse processes
action = extend, laterally rotate head/neck
supply = dorsal rami, deep cervical vessels
Erector Spinae
origin
insertion
action
supply
origin = posterior sacrum/ileum
insertion = spinous processes, transverse processes, & ribs
action = erect spine (posture)
supply = dorsal rami, lumbar/intercostal vessels
Levator Scapulae Origin Insertion Action Supply
origin = transverse processes insertion = upper medial scapula action = elevate scapula supply = dorsal scapular n/a/v
Identify 1-6.
- Splenius
- Semispinalis
- Longissimus
- Iliocostalis
- Spinalis
(#3-5 = Erector spinae)
Identify.
Trapezius
Transverse cervical artery is a branch off…
thyrocervical trunk
Latissimus Dorsi Origin Insertion Action Supply
origin = spinous processes T7-T12, crest of ileum insertion = bicipital groove of humerus action = adDucts, extends and medially rotates humerus supply = thoracodorsal n. & intercostal a/v
