Muscles & nerves Flashcards
what are the three types of muscles
Skeletal
Smooth
Cardiac
with regards to the muscle types, which are:
1. Voluntary
2. Involuntary
3. Striated
4. Non-striated
5. Multi-nucleated
6. Single nucleus
Skeletal
- 1
- 3
- 5
Smooth
- 2
- 4
- 6
Cardiac
- 2
- 3
- 6
what is the only muscle type that is voluntary and multinucleted
Skeletal
what are the 4 different types of muscle arrangement
Limb
Trunk
Proximal attachments (origin)
Distal attachments (insertion)
how many heads do the biceps and triceps act on + how many joints do they cross
Biceps:
2 heads
Cross 3
Triceps:
3 heads
Cross 2
what is the difference between anterior & posterior muscles
Anterior
- Contract
- Flexion
Posterior
- Lengthen
- Extension
what happens when the diaphragm contracts
It descends
Which increases thoracic volume
what are the three ways in which muscles are seperated into compartments
(compartmentalise)
Intermuscular septa (anterior & posterior)
Common nerves
Common actions
what is a plexus
a network of nerves
what plexuses supply the…
- Arms & forearms
- thigh & legs
- Neck
- Brachial (C5-T1)
- Lumosacral (L1-S4)
- Cervical (C1-C4)
what are examples of muscle shapes
Flattened/broad
- rectus abominus
Triangular
- delts
Thick & rounded
- Biceps
Dome-shapped
- Diahragm
how does the diaphragm attach to surrounding bones
via it’s central 3-leafed tendon
how many pairs of spinal nerves do we have
31
Cervical x8
Thoracic x12
Lumbar x5
Sacral x5
Coccygeal x1
how many vertebrae do we have
Is it the same as the spinal nerves
33
NOT the same as spinal nerves
Cervical x7
Thoracic x12
Lumbar x5
Sacaral x5
Coccygeal x4
where are the differences between spinal nerves and vertebrae
Cervical
- 7 vertebrae
- 8 nerves
Coccygeal
- 4 vertebrae
- 1 nerve
nerves= 31
vertebrae= 33
