Key bones of pectoral girdles
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Clavicle
Scapula
Planes
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Frontal/ Coronal: Horizontal
Sagittal: Vertical
, Transverse: Middle
Rectus Femoris
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Action: extension of the leg (and thigh flexion)
Origin: Anterior inferior iliac spine, superior
acetabulum
Insertion: Patella, tibial tuberosity
Innervation: Femoral nerve
Why does size and shape of vertebrae vary as we move inferiorly down vertebral
column.
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Has to support and body weight thus increases in size and thickness down
the vertebral column as curve increases strength, flexibility and ability to
absorb shock .
Hypothyroidism vs Hyper
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, Hyper speeds up metabolism too much thyroid hormone.
Both increase osteoporosis with osteoclast activity.
Excitation-Contraction Coupling
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Neural Control: action potential in motor neuron starts process at NMJ
Excitation: action potential causes ACh release from motor neuron, action
potential in sarcolemma
Ca2+ Release: action potential travels through triads and triggers release
of Ca2+.
Contraction Cycle Begins: Ca2+ binds troponin and exposes actin active
sites, cross bridges form as long as ATP and Ca2+
Sarcomeres Shorten: Thick and thin filaments slide, sarcomeres shorten,
muscle fiber comes closer
Muscle Tension Produced: entire muscle shortens and contraction
produces pull or tension on tendons.
Extension
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Posterior straightening
, Extensor Digitorum Brevis
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Action: extension of the toes
Origin: Calcaneus
Insertion: Base of middle phalanges
Innervation: Deep fibular nerve
Differences between Compact and Spongy Bone:
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Compact : Osteon, central canal, lamellae, lacunae in concentric circles
Spongey Bone: lacunae arranged in lattice-like network of matrix spikes,
trabeculae
Transversus Abdominis
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Give this one a try later!
Clavicle
Scapula
Planes
Give this one a try later!
Frontal/ Coronal: Horizontal
Sagittal: Vertical
, Transverse: Middle
Rectus Femoris
Give this one a try later!
Action: extension of the leg (and thigh flexion)
Origin: Anterior inferior iliac spine, superior
acetabulum
Insertion: Patella, tibial tuberosity
Innervation: Femoral nerve
Why does size and shape of vertebrae vary as we move inferiorly down vertebral
column.
Give this one a try later!
Has to support and body weight thus increases in size and thickness down
the vertebral column as curve increases strength, flexibility and ability to
absorb shock .
Hypothyroidism vs Hyper
Give this one a try later!
, Hyper speeds up metabolism too much thyroid hormone.
Both increase osteoporosis with osteoclast activity.
Excitation-Contraction Coupling
Give this one a try later!
Neural Control: action potential in motor neuron starts process at NMJ
Excitation: action potential causes ACh release from motor neuron, action
potential in sarcolemma
Ca2+ Release: action potential travels through triads and triggers release
of Ca2+.
Contraction Cycle Begins: Ca2+ binds troponin and exposes actin active
sites, cross bridges form as long as ATP and Ca2+
Sarcomeres Shorten: Thick and thin filaments slide, sarcomeres shorten,
muscle fiber comes closer
Muscle Tension Produced: entire muscle shortens and contraction
produces pull or tension on tendons.
Extension
Give this one a try later!
Posterior straightening
, Extensor Digitorum Brevis
Give this one a try later!
Action: extension of the toes
Origin: Calcaneus
Insertion: Base of middle phalanges
Innervation: Deep fibular nerve
Differences between Compact and Spongy Bone:
Give this one a try later!
Compact : Osteon, central canal, lamellae, lacunae in concentric circles
Spongey Bone: lacunae arranged in lattice-like network of matrix spikes,
trabeculae
Transversus Abdominis
Give this one a try later!
