week 8 Flashcards
scalenus medius attachments in horse
first rib; then divides into 2 parts;
dorsal part inserts on C7
ventral part inserts on C4-C6
Scalenus dorsalis attachments in ruminants
originates from 4th rib in ox and 2nd rib in goat; inserts on C4-C6
scalenus ventralis in ruminants
originates from 1st rib and inserts on C3-C7
Long thoracic nerve innervates
serratus ventralis
serratus dorsalis attachments
thoracolumbar fascia and inserts on ribs
serratus dorsalis cranialis attachments in horse
attaches lateral to iliocostalis to ribs 5 through 11 in the horse
serratus dorsalis cranialis attachments in ox
ribs 5 through 9
serratus dorsalis caudalis attachments in the horse
last 8 ribs
serratus dorsalis caudalis attachments in ox
last 3 ribs
serratus dorsalis caudalis attachments in SR
last 4 ribs
external intercostal muscles run _____
caudoventrally
internal intercostal muscles run ____
cranioventrally
external intercostal muscles are muscles of
inspiration
internal intercostal muscles are muscles of
expiration
rectus thoracis muscle attachments in horse
originates from 1st rib; the cartilage of the 4th rib and its aponeurosis joins rectus abdominis
rectus thoracis muscle attachments in ruminants
inserts on cartilages of 3, 4, 5 ribs and adjacent parts of the sternum
action of rectus thoracis muscle
assists with inspiration by drawing the first few ribs and costal cartilages cranially and laterally
longissimus thoracis courses
between the spines of the thoracic vertebrae and the transverse processes of more cranial thoracic vertebrae and lateral surface of ribs
iliocostalis thoracis courses
from the cranial lumbar vertebrae and cranial border of the ribs to the transverse process of C7 vertebra; as well as to the caudal borders of the ribs in the horse
external abdominal oblique muscle attachment
originates from 4th-18th ribs in horse and 6th-13th ribs in ruminants; thoracolumbar fascia; inserts on tuber coxae, body of ilium, linea alba
