Superficial back muscles Flashcards Preview

Anatomy > Superficial back muscles > Flashcards

Flashcards in Superficial back muscles Deck (25):
1

Superficial muscles: insertion and innervation

-scapula, clavical, humerus
-cranial nerve XI, spinal nerve via plexus

2

Intermediate muscles: insertion and innervation

-ribs distal to angle
-spinal nerves, anterior rami

3

Deep muscles: insertion and innervation

-vertebrae, skull, ribs (angle and proximal)
-spinal nerves, posterior rami

4

What are collections of nerve cell fibers entering or exiting the spinal cord?

spinal nerves

5

Where are motor neurons located? What do they form?

the ventral gray matter, ventral root

6

Where are sensory neurons located? What do they form?

dorsal root ganglia, dorsal root

7

Each spinal nerve divides into what?

a posterior ramus and an anterior ramus

8

When does a plexus form?

when the anterior rami of multiple spinal nerves combine

9

What is the path of cranial nerve XI?

enters the skull through the foramen magnum and then exits through the jugular foramen

10

What is the eleventh cranial nerve also called?

the spinal accessory nerve

11

Between the sternocleidomastoid and trapezius, what is superfical and vulnerable?

the accessory nerve (cranial nerve XI)

12

Most of the attachments of the superficial back muscles are on what?

scapula

13

Trapezius origin and insertion?

origin- superior nuchal line, external occipital protuberance, nuchal ligament, and SP of C7 to T12
insertion- laterla 1/3 of the clavicle and the acromion process and spine of the scapula

14

A standard clinical test for integrity of the accessory nerve is what?

elevated of the shoulder girdle against resistance

15

Latissiumus dorsi origin, insertion, innervation

origin- SP of T7-T12, ribs 9-12, thoracolumbar fascia, and iliac crest
insertion- floor of the intertubercular sulcus on the anterior humerus
innervation- toracodorsal nerve

16

Levator scapulae origin and insertion

origin- TP C1-4
insertion- the superior angle of the scapula

17

Rhomboid major and minor origin and insertion

origin- the nuchal and supraspinous ligaments, SP of T2-5 and C7-T2
insertion- the medial borer of the scapula

18

What is innervated by the dorsal scapular nerve?

the levator scapulae and the rhomboids

19

The intermediate back muscles have what shape due to the intermittent attachments to sequential ribs?

serrated (saw-tooth) appearance

20

trapezius blood supply

superficial branch of the transverse cervical artery

21

levator scapulae blood supply

dorsal scapular artery or deep branch of transverse cervical artery

22

rhomboid blood supply

dorsal scapular artery or deep branch of the transverse cervical artery

23

latissimus dorsi blood supply

thoracodorsal artery

24

serattus posterior blood supply

poseterior intercostal arteries

25

triangle of ausculation

medial- inferior margin of trapezius
-inferior- superior margin of latissimus dorsi
-lateral- medial border of scapula