topic 12

Question 1

what are the superficial muscles of the thoracic girdle

Answer 1

M. trapezius

M. omotransversarius - deeper than m. cleidocephalicus

M. latissimus dorsi

Mm. Pectorales superficiales (BS: thoracica externa)

Question 2

what are the deep muscles of the thoracic girdle

Answer 2

M. pectoralis profundus ((BS: thoracica externa)

M. rhomboideus – under trapezius

M. serratus ventralis

Question 3

what is deep pectoral mm also called

Answer 3

m. Pectoralis ascendens

Question 4

where is the n. thoracica longus found, target

Answer 4

m. serratus ventralis

innervates m. serratus ventralis thoracis

Question 5

where is the n. thoracica lateralis found, target

Answer 5

between/caudal to border of m. latissimus dorsi and m. pectoralis profundus

m. cutaneus trunci; cutaneous musculature of the abdomen

Question 6

cranial pectoral nerves origin

Answer 6

ventral branch of C6-C7

Question 7

where is n. thoracodorsalis found, target

Answer 7

medial surface of m. latissimus dorsi, running with corresponding artery and vein: reflect latissimus cranially!

innervate m. latissimus dorsi

Question 8

which nerves originate from C8, Th1, Th2

Answer 8

Pectoral caudal

Thoraca lateralis

Question 9

which nerves originate from C7

Answer 9

Thoracicus longus

Question 10

which nerves originate from C6, C7, C8

Answer 10

Pectoralis cranialis

Thoracodorsalis

Question 11

pectoral nerves dissection

Answer 11

Look between the superficial and deep pectoral muscles

The cranial nerves are found more cranially than the caudal nerves

Question 12

n. thoracica longus and n. thoracodorsalis dissection

Answer 12

Dissect with the aim of reflecting the forelimb. Transect the M. latissimusdorsi around the last rib (gives a nice piece to work with!), and reflect cranially. As you do this, try and abduct the scapula away from the body. The Mm. serratusventralis will be tight, holding the scapula to the chest. The nerve runs over the muscle belly