4. Back Myology Flashcards
Where do serrated muscles attach?
The ribs.
What does “fusiform” mean?
Big in the middle, small on the ends
What do Multicaudal muscles have that other’s don’t?
Multiple tendons
Functionally, what do Agonists do?
Flex a joint
Functionally, what do Antagonists do?
Extend a joint
What do Synergist muscles do?
Assists the agonists
For Trapezius
Innervation and Artery
Spinal Accessory Nerve (CN XI)
Transverse Cervical Artery
For Latissimus Dorsi
Innervation and Artery
Thoracodorsal Nerve
Thoracodorsal Artery
For Rhomboid Minor, Rhomboid Major and Levator Scaupluae
Innervation and Artery
Dorsal Scapular Nerve
Dorsal Scapular Artery
For Serratus Posterior Superior
Innervation and Artery
Intercostal Nerve
Intercostal Artery
For Serratus Posterior Inferior
Innervation and Artery
Anterior Ramus of T9-12
Intercostal Arteries
What three segments are there to the Iliocostalis Muscle?
Iliocostalis Lumborum (this is the only Lumborum)
Iliocostalis Thoracis
Iliocostalis Cervicis
What three segments are there for Longissimus?
Which portion is the largest for this muscle?
Longissimus Thoracis (largest)
Longissimus Cervicis
Longissimus Capitis (Inserts at the Mastoid process, to help locate it)
What region of Spinalis is likely to be visable?
Spinalis Thoracis (Even still is often confusible with Longissimus because it is small)
What is damaged in a back strain?
What is damaged in a back sprain?
A strain is damage to a muscle fiber by excessive stretching of a muscle due to contraction.
A sprain is injury to the ligamentous attachment between bones.
Remember that a sprained ankle has nothing to do with muscles.
What are the four types of Transversospinalis muscles?
How far (in number of vertebrae) does each one go up?
(From largest to smallest)
Semispinalis (5-6)
Multifidus (3-4)
Rotatores Longus (2)
Rotatores Brevis (1)
Within the group of Transversospinalis muscles, what are the three Semispinalis muscles?
Semispinalis Capitis
Semispinalis Cervicis
Semispinalis Thoracis (just a transversospinalis muscle that goes up 5-6)
What is the collective name of the muscles which traverse between spinous processes?
Interspinalis Muscles
What is the collective name for muscles which traverse between transverse processes?
Intertranversarii Muscles
What are the four muscles of the Suboccipital region?
What nerve innervates them?
Rectus Capitis Posterior Major
Rectus Capitis Posterior Minor
Obliquus Capitis Superior
Obliquus Capitis Inferior
The Suboccipital Nerve
Which three muscles make up the Suboccipital Triangle?
Rectus Capitis Posterior Major
Obliquus Capitis Inferior
Obliquus Capitis Superior
