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44 Cards in this Set

  • Front
  • Back
26 bones of the foot
7 tarsals
5 metatarsals
14 phalanges
2 sesmoid bones
the two arches of the foot (structure of foot)
-longitudinal arch: heal to heads of five metatarsals
-transverse arch: side to side concavity
joints
tibiofibular joint:
-syndesmotic amphiarthrodial joint
-joined at both proximal and distal tibiofibular joint
-minimal movement possible
-distal joint becomes sprained occasionally in heavy contact sport
syndesmosis joint sprain
high ankle sprain: primarily involves anterior inferior tibiofibular ligament
ankle is what kind of joint?
hinge joint
articulation of talus with distal ends of tibia and fibula
talocrural joint
membranous capsule
joints of the foot
subtalar and transverse tarsal joints:
classified as gliding, responsible for inversion and eversion, minimal movement in the remaining intertarsal joints and tarsometatarsal joints
joints of the foot (cont)
tarsometatarsal joints: gliding, not much movement

metatarsophalangeal joint: condyloid joints
structure of the foot
given strength and elasticity through large number of ligaments, muscles, and other connective tissue
-many joints that generally function together
movements:
1.plantar flexion/dorsi flexion:
2. eversion/inversion:
3.flexion/extension:
4.add/abd
1. ankle
2. subtalor and transverse tarsal joints
3. metatarsophalangeal and interphalangeal joints
4. metatarsophalangeal joints
anterior ankle and foot

posteriorly

laterally

medially
dorsal flexors

plantar flexors

evertors

invertors
plantar flexion
gastrocmenius
soleus
tibialis posterior
proneus longus
evertors
peroneus longus
dorsiflexors
tibialis anterior
invertors
tibialis anterior and posterior
vertical
jump
what will the height of the jump be determined by?
-the vertical velocity of the body's center of gravity
-the aim is to attain the greatest take-off
preparatory phase

takeoff phase
flex hip, knee, DF ankle

entend hip, knee PF ankle
mechanics for the VJ and two- joint muscle
many muscles of the lower extremeties cross more than 1 joint
-the muscle mass of the legs is concentrated near the proximal joint

-body must compensate as the distal joints support a greater proportion of the total body mass
bi articular muscles:
rectus femoris: flex hip and extend the knee

Ham strings: flex the knee and extend the hip

gastrocnemius: knee flexion and plantar flexion
the ankles power in the VJ
has 6x more power than could be generated during isolated ankle plantarflexion
-transferred mechanical energy from B-A muscles
B-A muscles help what
transfer mechanical energy, net result is basically an isometric contraction for these muscles
what are the benefits of isometric action
keep muscle near resting length: best for force-length property

keep muscles near zero shortening/ lengthening velocity: best for force velocity property

-this also allows the muscles to act as a stiff cable and transfer energy from more proximal uni-articular muscles to distal segments
in down phase (squat) the glute gives for to..
rectus femoris

and then the rec gives force to the gasterocnemus for the up phase (helps the ankle)
25% of the work done in plantar flexion was derived from the:
knee extensors via the GAS

this system allows large proximal muscles to do work at distal joints were muscles much smaller
the trunk and
spinal column
vertebral column : complex
24 intricate and complex articulating vertebrae

31 pairs of spinal nerves
bones
24 articulating and 9 fused vertabrae:
7 cervical (neck)
12 thoractic
5 lumbar (lower back)
5 sacrum
4 coccyx
3 normal curves within the spine
-thoracic spine curves posteriorly
-cervical and lumbar spine curve anteriorly
-spinal curves enable it to absorb blows and shocks
vertabrae increases in size from cervical to lumbar region due to
lower back having to support more weight
SPINAL DEVIATIONS:
-lordosis

-kyphosis

-lumbar kyphosis

-scoliosis
-increased posterior concavity of lumbar and cervical curves

-increased anterior concavity of thoracic curve

-reduction of normal lordotic curve, resulting in a flat back appearance
thorax: 12 pairs of ribs=
- 7 pairs of true ribs attach directly to sternum

-5 pairs of false ribs: 3 pairs attached indirectly to sternum and 2 pairs of floating ribs (ends are free)
all ribs are attached posteriorly
to the thoracic vertebrae
minimal movement between any 2 vertebrae except what
C1 and C2
atlanto-occipital articulation
two joints act as a hinge

permit flexion and extension

where the spine meets the brain
atlantoaxial articulation
perfect example of a pivot joint

sole function is rotation

Dens projects upward from axis and held in place by transverse ligament
most movement occurs in
cervical and lumbar

some slight thoracic movement
movements of head
movement between cranium and first cervical and within other cervical vertebrae
-referred as cervical movements
trunk movements
lumbar motion terminology describes combined motion in thoracic and lumbar
intervertebral disks
annulus fibrosus: outer rim of dense fibrocartilage

nucleus pulposus: central gelatinous, pulpy substance

compressed elastic material: allows compression in all directions along with torsion- becomes less resilient with age, injury, or improper use
trunk and spinal column muscles
sternocleidomastoid and splenius muscles: large muscles involved in cervical and head movements
erector spinae (trunk and spinal muscles)
largest muscle
extends on each side of spinal column from pelvic region to cranium
divided into 3 muscles, actually 9 muscles
trunk and spinal muscles- large abdominal muscles
lumbar movements: rectus abdominis, external oblique abdominal, internal oblique abdominal and quatratus lumborum
man muscles of trunk and spinal column function in
moving spine and aiding respiration
allllll muscles that move the head
originate on cervical vertebrae and insert on occipital bone of skull anterior