Flashcards in NEURO: SPINAL CORD Deck (108)
how many cervical vertebrae are there?
what is C1 called?
what is C2 called?
how many thoracic vertebrae are there?
how many lumbar vertebrae are there?
how many sacral vertebrae are there?
how many coccyx vertebrae are there?
how many vertebrae are there in the spine in total?
how many spinal nerves are there?
how is skeletal muscle attached to bone?
what is a skeletal muscle comprised of?
several muscle fasciculi
what is a muscle fasciculi comprised of?
several muscle fibres
what are muscle fibres comprised of?
comprised of myofibrils - actin and myosin
what happens when muscles are depolarised?
actin and myosin slide over each other to produce muscle contraction
what is the structure of cervical vertebrae?
- have a transverse foramen - contains vertebral artery and sympathetic chain
- has bifid spinous processes (except C7)
- C2 has prominent spike called dens
what is the structure of the thoracic vertebrae?
- spinous processes are much thinner and more descending
- have circular vertebral foramen
- have costal facets
what is the structure of lumbar vertebrae?
- spinous processes are thick and broad
- have a triangular vertebral foramen
what are the coverings of the spinal cord?
- subarachnoid mater
- pia mater
what does the central canal of the spine contain?
what is the role of the spinal cord?
provides autonomic innervation of most viscera
where are the 2 enlargements of the spinal cord located?
cervical (C3 - T1)
lumbar (L1 - S3)
what does the cervical enlargement of the spinal cord supply?
the upper limbs
what does the lumbar enlargement of the spinal cord supply?
the lower limbs
what is the conus medullaris?
it is the tapering of the spinal cord
what is the filum terminale?
the end of the spinal cord - found at the end of the conus medullaris
where does the spinal cord end at 3 months of foetal life?
extends the whole length
where does the spinal cord end at birth?
where does the spinal cord end in adulthood?
L1 - L2
what do axons in the dorsal cord of the spine convey?
afferent neurons - sensory