Back Flashcards
First layer of back muscles
Trapezius, Latissimus Dorsi
Second layer of back muscles
Levator scapula, R major, minor
Third layer of back muscles
Serratus post superior,
Serratus posterior inferior
Fourth layer of back muscles (deep):
splenius capitis
splenius cervicis
Fifth layer of back muscles (Deep)
iliocostalis
longissimus
spinalis
Sixth layer of back muscles (deep)
semispinalis
multifidus
rotatores
Serratus posterior superior attachments:
deep of rhomboids
spinous process of C7-T3
Serratus posterior superior action:
elevation of ribs, intercostal nerves
Serratus posterior inferior attachments:
deep to lats
spinous process of T11-L2
Serratus posterior inferior action:
depression of ribs
Splenius capitis attachments:
C7-T3
lateral occipital bone and mastoid process
Splenius capitis action:
extend and rotate
splenius cervicis attachments
spine of T3-T6
C1-C3
Splenius cervicis action:
extend and rotate to the same side
Splenius cervicis innervation
middle and lower cervical nerves
Splenius capitis innervation
middle and lower cervical nerces
Erector Spinae muscles
- Iliocostalis
- Longissimus
- Spinalis
Iliocostalis attachments:
sacrum, iliac crest and transverse processes of C4-C6
Iliocostalis innervation:
dorsal rami of spinal nerve
Iliocostalis action:
extension, ipsilateral rotation
fixed: elevation of pelvis
contralateral rotation