Muscles Flashcards
Erector spinae group innervation
spinal
erector spinae group origin
common tendon that attaches to the posterior surface of the sacrum, iliac crest, spinous processes of the lumbar and last 2 thoracic vertebrae
erector spinae group insertion
various attachments at the posterior ribs, spinous and transverse process of the thoracic and cervical vertebrae, and mastoid process of the temporal bone
erector spinae actions
extend the vertebral column
laterally flexes the vertebral column to the same side
serratus posterior superior innervation
t1-t4
serratus posterior superior origin
spinous process of c7-t3
serratus posterior superior insertion
posterior surface of the 2nd-5th ribs
serratus posterior superior actions
elevate the ribs during inhilation
serratus posterior inferior ionnervation
t9-t12
serratus posterior inferior insertion
posterior surface of 9-12 ribs
serratus posterior inferior origin
spinous process of t12-l3
serratus posterior inferior actions
depress the ribs during exhalation
external intercostals innervation
thoracic nerve
external intercostals origin
inferior border of the ribs above
external intercostals insertion
superior border of the ribs below
external intercostals actions
draw the ribs superiorly to assist with inhalation
internal intercostals onnervation
thoracic nerve
internal intercostals origin
inferior border of the ribs above
internal intercostals insertion
superior border of there in below
internal intercostals actions
draw the ribs inferiorly during exhalation
Diaphragm innervation
phrenic nerve form the cervical plexus C3, c4,c5 keeps the diaphragm alive
diaphragm origin
inner surfaces of lower 6 ribs, upper 2 or 3 lumbar vertebrae, inner part of xiphoid process
diaphragm insertion
central tendon
diaphragm actions
draw down the central tendon of the diaphragm
increase the volume of the thoracic cavity during inhalation