Muscle Table
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98 Terms
What innervates the Trapezius muscle?
Ventral rami
Spinal accessory nerve (CN XI)
What is the action of the Trapezius?
Elevates, retracts, and rotates the scapula; lower fibers depress scapula
What is this muscle?
Trapezius
What nerve innervates the Latissimus dorsi?
Ventral rami
Thoracodorsal nerve
What is the action of the Latissimus dorsi?
Extends, adducts, and medially rotates the humerus
What is this muscle?
Latissimus dorsi
What muscle group is the Trapezius in?
Superficial back
What muscle group is the Latissimus dorsi in?
Superficial back
What group is the Rhomboid major in?
Superficial back
What innervates the Rhomboid major?
Ventral rami
Dorsal scapular nerve
What is the action of the Rhomboid major?
Fixes scapula to thoracic wall and retracts and rotates it to depress glenoid fossa
What is this muscle?
Rhomboid major
What muscle group is the Rhomboid minor in?
Superficial back
What innervates the Rhomboid minor?
Ventral rami
Dorsal scapular nerve
What is the action of the Rhomboid minor?
Fixes the scapula to the thoracic wall and retracts and rotates it to depress glenoid fossa
What is this muscle?
Rhomboid minor
What muscle group is the Levator scapulae in?
Superficial back
What innervates the Levator scapulae?
Ventral rami
Anterior rami of C3-C4 spinal nerves, dorsal scapular nerve
What is the action of the Levator scapulae?
Elevates scapula medially, inferiorly rotates glenoid fossa
What is this muscle?
Levator scapulae
The Serratus posterior superior is in what muscle group?
Intermediate
What is the innervation of the Serratus posterior superior?
Ventral rami
Anterior rami of the T2-T5 spinal nerves
What is the action of the Serratus posterior superior?
Elevates ribs
What is this muscle?
Serratus posterior superior
What muscle group is the Serratus posterior inferior in?
Intermediate
What innervates the Serratus posterior inferior?
Ventral rami
Anterior rami of T9-T12 spinal nerves
What is the action of the Serratus posterior inferior?
Depresses ribs
What is this muscle?
Serratus posterior inferior
What muscle group is the Spleneius capitis in?
Superficial layer of the deep muscles
Spinotranversales
What innervates the Spleneius capitis?
Dorsal rami
Posterior rami of the C2-C3 spinal nerves
What is the action of the Splenius capitis?
Bilaterally: extends head
Unilaterally: laterally bends (flexes) and rotates face to same side
What is this muscle?
Splenius capitis
What muscle group is the Splenius cervicis (colli)?
Superficial layer of the deep muscles
Spinotraversales
What innervates the Splenius cervicis?
Dorsal rami
Posterior rami of C4-C6 spinal nerves
What is the action of the Splenius cervicis?
Bilaterally: Extends neck
Unilaterally: Laterally bends (flexes) and rotates neck toward same side
What is this muscle?
Splenius cervicis
What muscle group is the Iliocostalis in?
Intermediate group of the deep back muscles
Erector spinae
What innervates the iliocostalis?
Dorsal rami
Posterior rami of spinal nerves
What is the action of the iliocostalis?
Extend and laterally bend vertebral column and head
What is this muscle?
Iliocostalis
What muscle group is the Longissimus in?
Intermediate group of the deep back muscles
Erector spinae
What innervates the Longissimus?
Dorsal rami
Posterior rami of spinal nerves
What is the action of the Longissimus?
Extend and laterally bend vertebral column and head
What is this muscle?
Longissimus
What muscle group is the Spinalis in?
Intermediate group of the deep back muscles
What innervates the Spinalis?
Dorsal rami
Posterior rami spinal nerves
What is the action of the Spinalis?
Extend and laterally bend vertebral column and head
What is this muscle?
Spinalis
What Erector Spinae muscle is the most lateral?
Iliocostalis
What Erector Spinae muscle is intermediate?
Longissimus
What Erector Spinae muscle is the most medial?
Spinalis
What is the common origin of the Erector Spinae muscles?
Thoricolumbar fascia
What muscle group is the Semispinalis in?
Deep layer of the deep back muscles
Transversospinales
What innervates the Semispinalis?
Dorsal rami
Posterior rami of the spinal nerves
What are the main actions of the Semispinalis?
Extend head and neck and rotate them to opposite side
What is this muscle?
Semispinalis
What is within the Semispinalis?
Thoracis, cervicis, capitis
What is the muscle group of the Multifidus?
Deep layer of the deep back muscles
Transversospinales
What innervates the Multifidus?
Dorsal rami
Posterior rami of spinal nerves
What is the action of the Multifidus?
Stabilize spine
The Multifidus is a powerful what?
Rotator
What is this muscle?
Multifidus
What muscle group is the Rotatores in?
Deep layer of the deep back muscles
Transversospinales
What innverates the Rotatores?
Dorsal rami
Posterior rami of spinal nerves
What is the action of the Rotatores?
Stabilize, extend, and rotate spine
The Rotatores is a powerful what?
Rotator
What muscle group is the Interspinales in?
Deep layer of the deep muscles
What innverates the Interspinales?
Dorsal rami
Posterior rami and spinal nerves
What is this muscle?
Rotatores
What is the action of the Interspinales?
Aid in extension of vertebral column
What is this muscle?
Interspinalis
What muscle group is the Intertranversarii in?
The deep layer of the deep back muscles
What innvervates the intertransversarii?
Ventral rami
Medial: psoterior rami of spinal nerves
Lateral and anterior: anterior rami of spinal nerves
What is the action of the Intertransversarii?
Assist in lateral flexion of vertebral column
What muscle group is the Rectus capitis major in?
Suboccipital muscles
What is this muscle?
Invertransversarii
What innervates the Rectus capitis posterior major?
Suboccipital nerve
What is the action of the Rectus capitis posterior major?
Extends and rotates head to same side
What is this muscle?
Rectus capitis posterior major
What muscle group is the Rectus capitis posterior minor in?
Suboccipital
What innervates the Rectus capitis posterior minor?
Suboccipital nerve
What is the action of the Rectus capitis posterior minor?
Extends head
What is this muscle?
Rectus capitis posterior minor
What muscle group is the Obliquus capitis superior in?
Suboccipital
What innervates the Obliquus capitis superior?
Suboccipital nerve
What is the action of the Obliquus capitis superior?
Extends and bends head laterally
What is this muscle?
Obliquus capitis superior
What muscle group is the Obliquus inferior capitis in?
Suboccipital
What innervates the Obliquus inferior capitis?
Suboccipital nerve
What is the action of the Obliquus inferior capitis?
Rotates atlas to turn face to same side
What is this muscle?
Obliquus inferior capitis
The Rectus capitis posterior major/minor are running which way?
Up-down
The Obliquus capitis superior/inferior are running which way?
diagonal
What muscles are within the illiocostalis?
Lumborum, thoracis, cervicis
What muscles are within the Longissimus?
Thoracis, cervicis, capitis
What muscles are within the Spinalis?
Thoracis (independent), Cervicis
“I Love Spaghetti” can help remember what intermediate group of the deep back muscles?
I= Iliocostalis
Love = Longissimus
Spaghetti = Spinalis
“Says Mama Ragu” can help remember what deep layer of deep back muscles?
Says = Semispinalis
Mama = Multifidus
Ragu = Rotatores