Class Notes (835,600)
Canada (509,275)
York University (35,236)
KINE 2031 (127)
all (21)

Lecture Notes - W. Nov 28

4 Pages
Unlock Document

Kinesiology & Health Science
KINE 2031
All Professors

Lecture – November 28, 2013 Trunk Muscles Intercostals •Involved in inspiration and expiration •Protection of the underlying organs •Two sets Abdominals •Muscles on the anterior posterior •Quite a distance from the bone •Stability to the vertebral column •Stabilizers o Ligaments (muscles) o The shape also a stabilizer o Lungs, if you take a deep breath and lock the air, it produces air sacks, it stabilizes the trunk and pelvic girdle o When you contract abdominal muscles, so all the inside of the organs in the abdominal are pushed back towards vertebral column, this stabilizes as well •Landmarks o Belly button - umbilicus o Abdominal aponeurosis • Flat, broad • Anterior side o Line that goes in the middle is called the linea alba • Separates the two sides o Inguinal ligament • Inferior side of the aponeurosis • Connection of between anterior superior iliac spine and the crest of the pubic bone • Inferior folding of the aponeurosis • Just below this is the femoral artery and vein • That is where you can take a femoral pulse • Demarcation of the truck to the thigh Abdominal muscles •Three layers (External oblique, internal oblique, transversus abdominus and rectus abdominus) •Functions: o Move the trunk with the pelvic girdle o Stabilize vertebral column o Protect underline tissues •External oblique o Fiber direction, same as the fingers in pocket o Function: Flexion of the trunk, lateral flexion and rotation •Internal oblique o Fiber direction is perpendicular to external o Together creates a mesh (similar to intercostal) o Has an abdominal sheet o Function - trunk flexion, lateral flexion and rotation (opposite side to the muscle) • Internal oblique on the right side contracts, you rotate to the left • They help to maintain the shape, compress abdominal organs, and if you have fat you will have a protrusion • Inner is called the transversus abdominus o Create mesh protective purposes o Runs from the lumbar dorsal all the way across the linea alba, joins with the another side o Horizontal fiber direction o Function: doesn't move upper torso (no lateral flexion or flexion) • It can minimally rotate belly button area o When it contracts, squeezes the abdominal organs o All it is involved in compression and protection of the abdominal organs • Rectus abdominis muscle o Long strap like muscle on the anterior part of the abdomen o Six pack appearance o From Pubis bone to the xiphoid process o Powerful flexors of the trunk o This muscle is segmented • Muscle that is very long, can do a create deal of movement but can't produce a lot of force • BUT your abdominal is very important, thus it must produce a lot of force • Therefore there series of short muscles  Best of both worlds, it is long muscle (range of movement a lot) and powerful muscle o It is important to have strong abbs o Ripped appearance for weight lifters o Sections can be 4 or 3 (8 pack vs. 6 pack) Abdominal Muscles • Horizontal cross section • When you suck in the belly - is the transverse abdominals which contributes to it o Yes, as well as the rectus abdominus muscle
More Less

Related notes for KINE 2031

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.