Muscles - back Flashcards
(29 cards)
Superficial Extrinsic Back Muscles
Trapezius, Latissimus Dorsi, Rhomboids, Levator scapulae
Intermediate Extrinsic Back Muscles
Serratus posterior superior and inferior
What does an intrinsic back muscle do?
pertains to vertebral column, movement and posture
Superficial layer of intrinsic back muscles
splenius cervicis and capitis
Intermediate layer of intrinsic back muscles
erector spinae
Deep Layer of intrinsic back muscles
semispinalis, multifidus, rotatores, interspinales, intertransversarii, levatores costarum
Suboccipital Region Muscles
Rectus capitis posterior major, Rectus capitis posterior minor, obliquus capitis inferior, obliquus capitis superior
What innervates Trapezius?
Accessory Nerve CNXI
What innervates Rhomboids?
Dorsal scapular nerve (C5)
What innervates Latissimus dorsi?
Thoracodorsal (C7,8)
What innervates Levator Scapula?
Dorsal scapular nerve (C5)
What innervates splenius?
Dorsal rami (C2-6)
What innervates erector spinae?
Dorsal rami
What innervates multifidus?
C1-L5 dorsal rami
What innervates rotatores?
C1-L5 dorsal rami
What innervates semispinalis?
dorsal rami
What is the actions of Trapezius?
elevates, depresses, rotates anteriorly, retracts scapula
What is the actions of the Rhomboids?
retracts, rotates inferior, elevates scapula
What is the action of Levator Scapula?
elevates scapula
What is the action of Latissimus dorsi?
extends arms and rotates medially
What is the action of Serratus Posterior Superior and Inferior?
Respiratory
What is the action of Splenius Capitis and Cervicis?
Extends and laterally bends neck, rotates head to acting side
What is the action of erector spinae?
Extends and laterally bends everything
What is the action of Semispinalis capitis and cervcis?
Extends and laterally bends, rotates opposite
