Crossfit anatomy Flashcards
Thoracic
middle segment of vertebrae
Lumbar
The bottom 5 vertebrae
Leverage
mechanical advantage
Midline (frontal plane)
divides body into ventral and dorsal (anterior and posterior) halves
anterior (ventral)
front of body
posterior (dorsal)
back of body
deltoids
responsible for shoulder abduction and transverse etension
rhomboids
responsible for scapular retraction
pectoralis major
responsible for humerus flexion abductions and keeping arm attached to trunk of body
pectoralis minor
responsible for moving scapula anterioly
biceps brachii
responsible for flexion at elbow and supination of forearm (corkscrew)
rectus femoris
large middle muscle of the quads attaches to illium and is a hip extensor
vastus lateralis
most outside quad muscle
vatus medialis
most inside quad muscle
vastus intermedialis
middle quad muscle under the rectus femoris
concentric contraction
muscle fibers shorten to generate force to overcome a load
eccentric contraction
decelerating contraction, muscle fibers lengthen, force produced is not enough to overcome a load
lever
a rigid rod pivot around a fixed point (bones)
fulcroms
pivot point (joints)
flexion
decrease angle between two points
extension
increase angle between two points
proprioception
body awareness, knowing where parts of your body are in relation to other parts
hypertrophy
increase in the volume of an organ or tissue due to enlargement of the cells
atrophy
wasting of organ or tissue in the body
anabolic
more complex structures built from simpler ones
catabolic
simpler structures created by the break down of more complex ones. destructive metabolism
eustress
positive response to a stessor
destress
negative response to a stressor
Triceps brachii
large 3 headed muscle on the back of the arm responsible for elbow extension
cranium
first and largest of two bones in the skull
mandible
second and smaller of two bones in the skull
sternum
breastbone connected to ribs
manubrium
wide upper region of sternum connected to clavicles and first ribs
sternum body
long middle region of sternum
xiphoid process
small pointed lower region of sternum
rib cage
core thoracic structure of skeleton, supports the shoulder girdle
cervical spine
top 7 vertebrae
shoulder girdle
scapulae and collarbone, connects the arm to the skeleton