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38 terms

Vet tech bones and muscles

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masseter
elevates the mandible to close jaw when chewing.
intercostals
Expiratory (exhale)
diaphram
Inspiratory (inhale)
exturnal obliques
flexes vertebral column/abdominal press
latissimus dorsi
draws limbs caudally, flexes shoulder joint
pectorals (transverse and descending)
adducts the thoracic limb
triceps brachii
extends elbow, flexes shoulder
biceps brachii
flexes elbow, extends shoulder
biceps femoris
extends hip, and tarsus. Flexes stifle
semitendonosis
extends hip, and tarsus. Flexes stifle
gracialis
adducts limb, flexes stifle,extends hip and hock.
satorius
flexes hip, extends stifle
quadriceps femoris
extends stifle, flexes hip
linea alba
Left and right parts of each oblique muscle come together on the ventral midline
brachiocephalicus
pulls limb forward, extends shoulder, moves head and neck laterally
Origin
Site of muscle attachment that is more stable.
The origin has the least amount of movement during muscle contraction.
incertion
The site of muscle attachment that undergoes the most movement during contraction.
3 types of muscle
smooth, cardiac, skeletal.
Cutaneous Muscles
Thin, broad, superficial muscles
Found in the fascia just beneath the skin
Little or no attachment to bones
Serve to twitch the skin
aggonist
muscle that produces a desired movement.
antagonist
opposes the action of a prime mover
fixator muscles
stabilize joints to allow other movements to take place.
muscle contraction phase
latent, contract, relax
Myocytis
ripping of muscle
Hypertrophy
over extended muscle
Atrophy
wasted muscle from not being used
paralysis
Loss or impairment of motor (muscular) function resulting from a lesion of nervous or muscular in origin
Curare Chondrodendron
Prevents nerve impulses from reaching the neuromuscular junction
Clostridium tetani - Tetanus
Produces the toxin tetanospasmin
Inhibits some of the nerve impulses from reaching the neuromuscular junction
Clostridium botulinum - Botulism
Interferes with the release of acetylcholine
Nerve can not contract muscle
Bone function
Support
Protection
Storage
Movement
Blood cell formation
articular cartilage
around the ends where the joint meets
Epiphyseal Plate
Growth plate
diaphysis
long portion of a bone.
epiphysis
end of bone
periosteum
layer surounding diaphysis- contains osteoblast
medullary cavity
holds bone marrow
condyle
large round articular surface