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ANA534 T2 Muscle Inf
information on all muscles we need to know
Question | Answer |
---|---|
Serratus Posterior Superior Origin | spinous process of C7-T3 |
Serratus Posterior Superior Insertion | upper border of the 2nd-4th ribs |
Serratus Posterior Superior Innervation | 2nd-5th intercostal nn. |
Serratus Posterior Superior Action | elevates ribs 2-5 feeble |
Serratus Posterior Inferior Origin | spinous processs of T11-L2 |
Serratus Posterior Inferior Insertion | inferior border of lower 3 ribs (8-12) |
Serratus Posterior Inferior Innervation | Spinal nn. T9-T12 |
Serratus Posterior Inferior Action | depresses ribs |
Splenius Capitis Origin | ligamentum nuchae, spinous process of C7-T3 |
Splenius Capitis Insertion | mastoid process, occipital |
Splenius Capitis Innervation | dorsal rami of spinal nn C1-C6 |
Splenius Capitis Action | extend, rotate and laterally flex the head with Splenius cervicis extend the head and neck |
Splenius Cervicis Origin | spinous process of T3-T6 |
Splenius Cervicis Insertion | transverse process C1-C2 |
Splenius Cervicis Innervation | Dorsal rami of spinal nn C1-C6 |
Splenius Cervicis Action | extend adn rotates cervical spine with splenius capitis extend the head and neck |
Spinalis, lonissimus and iliocostalis Insertions | common inferior origin=sacrum, iliac crest and sacriliac ligament originate from: half of liagmentum nuchae and spinous proces of T1-6 |
Spinalis Action | extends from spinous process to spinous process |
Liagmentus Action | extends to the transverse processes and ribs |
Ilicostaslis Action | extends the angles of the ribs |
Spinalis, Ligamentus and Ilicostaslis Action | Unilaterally: flex the spinal column Bilaterally: extend head and vertebral column |
Semispinalis capitis Origin | transverse processes of c4-T7 |
Semispinalis Capitis Insertion | b/ superior and inferior nuchal lines |
Semispinalis Capitis Innervation | dorsal primary rami |
Semispinalis Capitis Action | extends and laterally rotates face to opposite side |
Semispinalis Cervicis Origin | transverse processes of T1-T6 |
Semispinalis Cervicis Insertion | spinou sproceese of C2-C5 |
Semispinalis Cervicis Innervation | dorsal primary rami |
Semispinalis Cervicis Action | extends and rotates cervical spinal column |
Semispinalis Thoracis Origin | transverse processes of T6-T12 |
Semispinalis Thoracis Insertion | spinou sprocesses of C6-T4 |
Semispinalis Thoracis Innervation | dorsal primary rami |
Semispinalis Thoracis Action | extends and rotates thoracic spinal column |
Multifidus Origin | transervse processes |
Multifidus Insertion | spinou sprocesses + laminae |
Multifidus Innervation | dorsal primary rami |
Multifidus action | bends or laterally flexes vertebral column and roates it to the opposite side; extend vertebral column |
rotatores action | rotators |
rotatores origin and insertion | b/w spinous and transverse processes |
rotatores innervation | dorsal primary rami |
intertransverse action | lateral flexors |
intertransverse orgin and insertion | adjacent transverse processes span one vertebral level |
intertransverse innervation | dorsal primary rami |
interspinales action | extensors |
interspinales origin and insertion | spinous processes of adjacent vertebrae span one vertebral level |
interspinales innervation | dorsal primary rami |
boundaries of sub occipital triangle: Roof | semispinalis capitis |
boundaries of sub occipital triangle: floor | atlanto-occipital membrane |
boundaries of sub occipital triangle: lateral | superior oblique |
boundaries of sub occipital triangle: medial | rectus capitis major |
boundaries of sub occipital triangle: inferior | inferior obliue |
muscle innervated by suboccipital n in suboccipital triangle | rectus capitis major recutus cpaitis minor superior oblique inferior oblique |
rectus capitis major origin and insertion | from spinous process of c2 to inferior nucahal line of skull |
recutus capitis minor origin and insertion | from transverse process of C1 to the inferior nuchal line of the skull |
Superior oblique origin and insertion | from transverse process of C1 to area b/w inferio rand superior nuchal lines on skull |
Rectus Capitis Major and Minor and Superior Oblique Action | postural muscle rotate head ot the same side unilaterally and extend bilaterally |
inferior oblique origin and insertion | spinrous process of C2 to transverse process of C1 |
inferior oblique action | pulls on atlas rotates head |
intercostals origin | inferior margin of rib above |
intercostals insertion | superior margin of rib below |
intercostals innervation | dorsal primary rami intercostal nn |
intercostals action | external-elevates ribs (inspiration) internal and innermost-depress ribs (expiration) |
anterior abdominal wall musculature action | 1. support and compress viscera 2. flex vertebral column with bilateral contraction 3. lateral flexion vertebral column with unilateral contraction 4. rotation of the trunk when internal abdominal oblique and contralateral external oblique contract |
anterior abdominal wall musculature innervation | intercostal nerves T7-12 and L1 |
anterior abdominal wall musculature includes | external abdominal oblique internal abdominal oblique transversus abdominis |
External abdominal oblique origin | lower 8 ribs |
boundaries of inguinal canal: anterior | external abdominal oblique aponeurosis |
boundaries of inguinal canal: posterior | transversalis fasic and internal abdominal oblique transversus abdominis arch over and therefore to not contribute to spermatic cord |
boundaries of inguinal canal: roof | arching fibers of internal abdominal oblique and transversus abdominus |
boundaries of inguinal canal: floor | inguinal and lacunar ligaments |
Quadrastus Lumborum orgin and insertion | R12 to tips of lumbar transverse process b/x L5 and iliac crest |
Quadrastus lumborum action | stablizies R12 in inspiration laterally flexes trunk |
Quadratus Lumborum innervation | ventral rami of T12 L1 2 3 |
Psoas Major origin and insertion | attaches to lumbar transverse processes before passing out under inguinal ligament with iliacus muscle to commmon tendinous attachment of hte lesser trochanter of the femur |
Psoas Major action | flexor of thigh |
Psoas Major Innervation | ventral rami L123 |
Iliacus origin and insertion | arises from internal aspect of ala of hte iliac bone |
iliacus action | flexes thigh |
iliacus innervation | femoral n |
liopsoas | flexor of the hip in the trunk |
lumbar plexus | formed by the ventral primary rami of L1-5 and contribution of T12 |
iliohyposgastric nerve | L1 cutaneous innnervation of posterolateral gluteal region and suprapublic area |
ilioinguinal nerve | L1 cutaneous innervation of proximal medial thigh and scotum/mons publics |
lateral femoral cutaneous nerve | L2-L3 cutaneous innervation of lateral side of thigh |
genitofemoral nerve | L2-L3 cutaneous innervation of genitalia and thight, genital branch joins spermatic cord to innervate cremaster msucle |
femoral nerve | L2-L4 innervates anterior region of thight, motor nerve |
obturator nerve | L2-4 innervates medial side of the thigh |
lumbosacral trunk | L4-5 contributes fibers to sacral plexus |
piriformis m origin | anterior surface of middle 3 sacral segments sacrum |
piriformis m inneration | S1 2 |
prisiformis | contributes to postero-lateral pelvic wall passes laterally through greater sciatic foramen forms bed a bed on which teh sacral nerve plexus lies |
pirisformis insertion | greater torchanter of femur |
obturator internus oirgin and insertion | over obturator foramen pases through lesser sciatic foramen to attach to greater trochanter of femur |
obturator internus | forms alteral pelvic wall deep fascia thickened to form tendinous arc to whcih muscles of pelbic floor attach |
obturator internus innervation | nerve to obturator internus S1 S2 |
obturator internus origin | ishiopublic amus and obturator memebrane |
piriformis action | abducts and rotates laterally thigh and stablizies hip during walking |
obturator internus action | rotate thigh laterally |