Question | Answer |
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) |