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Trunk, Head, & Neck

Muscles, innervations, orginis, insertions, actions, and mmt

QuestionAnswer
Temporalis Origin Origin: Temporal fossa and fascia
Masseter Innervation Trigeminal
Temporalis Innervation Trigeminal
Temporalis Action Closes the jaw
Masseter Origin (Superficial portion) Zygomatic process of themaxilla and lower border of the zygomatic arch
Masseter Insertion (Superficial portion) Angle and ramus of the mandible
Masseter Action (both portions) Closes the jaw
Masseter Origin (Profundus portion) Posterior 1/3 of inferior border and medial surface of the zygomatic arch
Masseter Inserstion (Profundus portion) Superior 1/2 of ramus and lateral surface of coronoid process of mandible
Medial Pterygoid Innervation Trigeminal
Buccinator Innervation Facial
Buccinator Action Compresses the cheeks
Orbicularis Oris Innervation Facial
Orbicularis Oris Action Closes lips and protrudes them forward
Mentalis Innervation Facial
Mentalis Action Raises and protrudes the lower lip and wrinkles the skin on chin, as in pouting
Levator Anuli Oris Innervation Facial
Levator Anguli Oris Action Depresses the nasolabial furrow, as in expressions of contempt or disdain
Zygomaticus Major Innervation Facial
Zygomaticus Major Action Draws angle of the mouth up and out , as in a smaile
Corrugator Supercilli Innervation Facial
Corrugator Supercilli Action Draws the eyebrow downward and inward with vertical wrinkles in forehead; "frownign muscle"
Temporalis Insertion Insertion: Coronoid process & anterior border of ramis of the mandible
Medial Pterygoid Origin Medial surface of the lateral ptergyoid plate, pyramidal process of the palatine bone and tuberosity of the maxilla
Medial Pterygoid Insertion Interior & posterior part of medial surface of the ramus and angle of the mandibular foramen
Medial Pterygoid Action Closes the jaw
Frontalis Innervation Facial
Frontalis Action Raises the eyebrow and wrinkles the forehead, as in expressions of suprise or fright
Depressor Anguli Oris Innervation Facial
Depressor Anuli Oris Action Depresses the angle of the mouth
Orbicularis Oculi Innervation Facial
Orbicularis Oculi Action Closes the eye
Platysmus Innervation Facial
Platysmus Action Retracts and depresses the angle of the mouth
Sternocleidomastoid Innervation C2, 3, 4, Spinal accessory cranial nerve XI
Sternocleidomastoid Medial or Sternal Head Origin Cranial part of the manubrium sterni
Sternocleidomastoid Lateral or Clavicular Head Origin Medail 1/3 of clavicle
Sternocleidomastoid Medial or Sternal Head Insertion Lateral surface of mastoid process
Sternocleidomastoid Lateral or Clavicular Head Insertion Lateral 1/2 of superior nuchal line of occipital bone
Sternocleidomastoid Action Bilaterally Extenstion, flexion, and lateral flexion
Sternocleidomastoid Action Unilaterally Rotation towards the opposite side
Scalenus Anterior Innervation VPR, C4,5,6
Scalenus Anterior Origin Anterior tubercle of transverse processes of 3rd-6th cervical vertebrae
Scalenus Anterior Insertion Scalene tubercle and cranial crest of the first rib
Scalenus Anterior Action Bilaterally Flexion and lateral flextion of neck
Scalenus Anterior Action Unilaterally Rotation towards the same side
Scalenus Medius Innervation VPR, C3-8
Scalenus Medius Origin Posterior tubercles of transverse processes of C2-7
Scalenus Medius Insertion First rib, cranial surface between tubercle and subclavian groove
Scalenus Medius Action Bilaterally Lateral flexion of the neck
Scalenus Medius Action Unilaterally Rotation towards opposite side
Scalenus Posterior Innervation VPR, C6-8
Scalenus Posterior Origin By two or three tendons from posterior tubercles of transverse processes of last two or three cervical vertebrae
Scalenus Posterior Insertion Outer surface of the second rib
Scalenus Posterior Action Bilaterally Lateral flexion of the neck
Scalenus Posterior Action Unilaterally Rotation towards opposite side of neck
Rectus Capitus Posterior Major Innervation Dorsal Ramus of C1
Rectus Capitis Posterior Major Origin Starts by a pointed tendon from the spine of the axis and becoming broader as it ascends
Rectus Capitis Posterior Major Insertion Attached to the lateral part of the inferior nuchal line of the occipital bone and the bone immediately below the line
Rectus Capitis Posterior Major Action Bilaterally Extends the head
Rectus Capitis Posterior Major Action Unilaterally Turns the face towards the same side
Recus Capitis Posterior Minor Innervation Dorsal Ramus of C1
Rectus Capitis Minor Origin Arises by a narrow pointed tendon from teh tubercle on the posterior arch of the atlas (C1)
Rectus Capitis Minor Insertion Medial part of the inferior nuchal line of the occipital bone and also the bone between teh line and the foramen magnum
Rectus Capitis Minor Action Extension of the neck
Obliquus Capitis Superior Innervation Dorsal Ramus of C1
Obliquus Capitis Superior Origin Arrises by tendinous fibers from the upper surface of the transverse processes of C1
Obliquus Capitis Superior Insertion Occipital bone between superior and inferior nuchal lines, lateral to teh semispinalis capitis and overlapping the insertion of the recuts capitis posterior major
Obliquus Capitis Superior Action Extension and lateral flexion of the neck
Obliquus Capitis Inferior Innervation Dorsal Ramus of C1
Obliquus Capitis Inferior Origin Lateral surface of the spine and adjacent part of the upper part of the lamina of C1
Obliquus Capitis Inferior Insertion Lower and back part of the transverse process of C1
Obliquus Capitis Inferior Action Unilaterally-rotation of head to same side
Splenius Capitus Innervation Dorsal Rami of C1-8
Splenius Capitus Action Unilaterally Extension, lateral flexion and rotation of the neck to the ssame side
Splenius Capitis Action Bilaterally Extension of the neck
Splenius Cervicis Innervation Dorsal Rami C1-8
Splenius Cervicis Action Bilaterally Extension of neck
Splenius Cervicis Action Unilaterally Extension, lateral flexion, and rotation of the neck, turning face towards the same side
Semispinalis Cervicis Innervation dorsal rami of C1-8
Semispinalis Cervicis Action Extension of vertebral column and rotation toward opposite side in upper thoracic and cervical areas
Semispinalis Cervicis Innervation Dorsal Rami of C1-8
Semispinalis Cervicis Action Extension of vertebral column and rotation toward opposite side in upper thoracic and cervical areas
Semispinalis Capitis Innervation Dorsal Rami of C1-8
Semispinalis Capitis Action Extension of neck and rotation of head toward opposite side
Longissimus Cervicis Innervation Dorsal Rami of C1-8
Longissimus Cervicis Action Extension and lateral flexion of vertebral column in cervical area; draws ribs downward
Cervical Erector Spinae Innervation Dorsal Rami C1-8
Cervical Erector Spinae Action Extension of vertebral column in cervical region
Longus Colli Innervation Ventral Rami of C2-6
Longus Colli Action Neck flexion
Longus Capitus Innervation Ventral Rami of C1-5
Longus Capitus Action Neck Flexion
Rectus Capitus Anterior and Lateralis Innervation Branches from the loop between VPR of C1 and C2
Rectus Capitus Anterior and Lateralis Action Neck Flexion
Lumbar Erector Spinae Innervation Adjacent DPR of spinal nerve
Lumbar Erector Spinae Action Back Extension
Lumbar Multifidus Innervation Adjacent DPRof spinal nerve
Lumbar Multifidus Action Back Extension
Quadratus Lumborum Innervation Ventral Rami of T12, L1,2,3
Quadratus Lumborum Origin Iliolumbar ligament, iliac crest
Quadratus Lumborum Insertion Inferior border of the last rib and transverse procersses of L1-4
Quadratus Lumborum Action Elevation of pelvis on side being tested
Rectus Abdominis Innervation Ventral Primary Rami of T6-12 and L1
Rectus Abdominis Origin Pubic crest and symphysis
Rectus Abdominis Insertion Costal cartilages of the 5-7th ribs and xiphoid process
Rectus Abdominis Action Flexes the vertebral column by approximating the thorax and pelvis anteriorly with the pelvis fixed, the thorax will move toward the pelvis; withthe thorax fixed the pelvis will move toward the thorax
Internal Oblique Lower Anterior Fibers Innervation Ventral Rami T6-12
Internal Oblique Lower Anterior Fibers Origin Lateral 2/3 of inguinal ligament and short attachment on iliac crest near ASIS
Internal Oblique Lower Anterior Fibers With the transverse abdominis into cres of the pubis medial part of the pectineal line and into the lina alba by means of an aponeurosis
Internal Oblique Lower Anterior Fibers Action Compress and support teh lower abdominal viscera in conjunction with the transversus abdominus
Internal Obliques Upper Anterior Fibers Innervation VPR T6-12
Internal Obliques Upper Anterior Fibers Origin Anteior 1/3 of intermediate line of iliac crest
Internal Obliques Upper Anterior Fibers Insertion Linea alba by means of aponeurosis
Internal Obliques Upper Anterior Fibers Action Bilaterally Flex vertebral column and support and compress the abdominal viscera, depress the thorax ande assist in respiration
Internal Obliques Upper Anterior Fibers Action Unilaterally In conjunction with anterior fibers of external obliques on the opposite side, the upper anterior fibers rotate the vertebral column, bringing the thorax backwards when pelvis is fixed or the pelvis forward when thorax is fixed
Internal Obliques Lateral Fibers Innervation VPR T6-12
Internal Obliques Lateral Fibers Origin Middle 1/3 of intermediate line of the iliac crest and the thoracolumbar fascia
Internal Obliques Lateral Fibers Insertion Inferior borders of ribs 10-12 and the linea alba by means of an aponeurosis
Internal Obliques Lateral Fibers Action Bilaterally Flex the vertebral column and depress thorax
Internal Obliques Lateral Fibers Unilaterally with the lateral fibers of the external oblique on the same side laterally flex the vertebral column; also act with external oblique on opposite side to rotate the vertebral column
External Oblique Anterior Fibers Innveration VR T6-12
External Oblique Anterior Fibers Origin External Surfaces of ribs 5-8, interdigitating with the serratus anterior
External Oblique Anterior Fibers Insersion Into a broad, flat aponeurosis, terminating in the linea alba, which is a tendinous raphe that extends from teh xiphoid
External Oblique Anterior Fibers Action Bilaterally Flex the vertebral column, support and compress the abdominal vicera, depress the thorax and assist in respiration
External Oblique Anterior Fibers Unilaterally With anterior fibers of internal oblique, rotate the vertebral column, bring the thorax forward when pelvis is fixed and vice versa
External Oblique Lateral Fibers Origin External surface of the 9th rib, interdigitating with the serratus antrior, and external surfaces of the 10th-12th ribs, interdigitating with the latissimus dorsi
External Oblique Lateral Fibers Insertion as the inguinal ligament, into the anterosuperior spine and pubic tubercle and into the external lip of the anterior 1/2 of the iliac crest
External Oblique Lateral Fibers Innervation Dorsal rami of T6-12
External Oblique Lateral Fibers Action Bilaterally Flex the vertebral column with a major infuence on the lumbar spine, tilting the pelvis posteriorly
External Oblique Lateral Fibers With the fibers of the internal oblique on the same side, these fibers of the external oblique latterally flex the vertebral column (comparable to the sternocleidomastoid's action on the head)
Created by: aglade