Muscles of the Spine and Deep Back Flashcards
(36 cards)
What are the extrinsic muscles of the back?
(Superficial Layer)
Axioapendicular skeleton
- Trapezius
- Lattisimus Dorsi
- Elevator Scapulae
- Rhomboids
(Intermediate Layer)
- Serratus posterior superior
- Serratus posterior inferior
ATTACHMENTS of trapezius
from the superior nuchal line, external occipital protuberance, ligamentum nuchae, & cervical & thoracic spinous processes to the clavicle, acromion & scapular spine
INNERVATION of trapezius
accessory nerve (CN XI)
ATTACHMENTS of lattisimus dorsi
from lower thoracic spinous processes, thoracolumbar fascia & iliac crest to the floor of the intertubercular sulcus of the humerus
INNERVATION of lattisimus dorsi
ventral rami of spinal n.
ATTACHMNETS of llevator scapulae
from transverse processes of C1-C4 to the superior angle & superomedial border of the scapula
INNERVATION of llevator scapulae
ventral rami of spinal n.
ATTACHMENTS of rhomboids
major: from spinous processes T2-5
minor: from ligamentum nuchae & spinous processes C7-T1 to the medial border of the scapula
INNERVATION of rhomboids
ventral rami of spinal n.
ATTACHMENTS of serratus posterior superior
from spinous processes of C7-T3 to inferior borders of ribs 2-5
INNERVATION of serratus posterior superior
intercostal nn. (T1-4)
ATTACHMENTS of serratus posterior inferior
from spinous processes of T11-L2 to inferior borders of ribs 9-12
INNERVATION of serratus posterior inferior
intercostal nn. (T9-12)
What are the Intrinsic Muscles of the Back?
(Superficial Layer)
- Splenius Capitis
- Splenius Cervicis
(Intermediate Layer)
Erector Spinae
- Spinalis
- Longissimus
- Iliocostalis
(Deep Layer)
Transversospinalis:
- Semispinalis
- Multifidous
- Rotatores
Interspinalis
Intertransversari
ATTACHMENTS of splenius capitis
from ligamentum nuchae and spinous processes T4-C7 to the mastoid process
INNERVATION of splenius capitis
dorsal rami of spinal nerves
ATTACHMENTS of splenius cervicis
from spinous processes of T3-T6 to posterior tubercles of transverse processes of C1-3
INNERVATION of splenius cervisis
dorsal rami of spinal nerves
What does the erector spinae muscle group include?
- Spinalis
- Iliocostalis
- Longissimus
ATTACHMENTS of erector spinae
from TLF attached to the sacrum, iliac crest, spinous processes L5-T11, supraspinous lig.
(iliocostalis): angles of ribs to costal angles
(longissimus): ribs & transverse processes
(spinalis): and spinous processes
PARTS of spinalis
capitis, crevicis, thoracis
PARTS of longissimus
capitis, cervicis, thoracis
PARTS of iliocostalis
cervicis, thoracis, lumborum
INNERVATION of erector spinae muscles
(spinalis, longissimus, iliocostalis)
dorsal rami of spinal nerves
