Spinal cord Flashcards
Spinal cord
Medulla spinalis
Describe the spinal cord in three words
Long, cylindrical and segmented
Spinal cord receives ______ from _____, _______ and ________
Sensory input
From limbs, organs and trunk
What kind of processing of info happens in the spinal cord?
Initial processing of info
Spinal cord passes through ________ to _______
In _____________, goes through _____________ of vertebrae
Through foramen magnum to L1- L2
In canalis vertebralis, goes through foramen vertebrale of vertebrae
What happens to the spinal cord caudal to the lumbar segments?
It tapers into conus medullaris
How does the spinal cord terminate?
Terminates in a thin strand called filum terminale, which anchors the spinal cord
What are the functions of the spinal cord?
Sensory and motor innervation of entire body inferior to head through spinal nerves
Functions of the spinal cord. There is a two-way _______ pathway between ____ and the _____
Two-way conduction pathway
Between body and the brain
Functions of the spinal cord. The spinal cord is a center of what?
Major center of reflexes
Which one grows faster:
a) spinal cord OR b) vertebral columns
What does this cause?
Vertebral columns grow faster than the spinal cord
This causes the segments of the cord to be cranial where their corresponding spinal nerves emerge through intervertebral foramina
Intervertebral foramina in latin?
Foramen intervertebrale
Cauda equina
All nerves that originate at Conus medullaris move caudally and form a collection of nerve roots at the caudal end of the vertebral canal
The spinal cord is divided by its location to:
Pars; cervicalis, thoracica, lumbalis, sacralis and caudalis
PARTS: Sulcus medianus
Dorsally in the centre
PARTS: Sulcus intermedius dorsalis
Between the other two
PARTS: Sulcus lateralis dorsalis
Dorsally and laterally located
PARTS: Fissura mediana
Deep median fissure in the ventral side
PARTS: Septum medianum dorsale
From median groove- into the spinal cord
PARTS: Dorsally in the centre
Sulcus medianus
PARTS: Dorsally and laterally located
Sulcus lateralis dorsalis
PARTS: Deep median fissure in the ventral side
Fissura mediana
PARTS: From median groove- into the spinal cord
Septum medianum dorsale
Spinal nerves are formed by the conjoining of ______ and ______ roots, which come together as the ______ at the point where the _____ exit and _____ the vertebral canal
Spinal nerves are formed by the conjoining of Dorsal and ventral roots, which come together as the __nerve__ at the point where the __axons__ exit and _enter__ the vertebral canal
The cord is ________ dorso______ and has an _______ shape. It is enlarged in ______ and ______ regions
- Intumescentia cervicalis: - Intumescentia lumbalis:
Compressed dorsoventrally and has an elliptical
It is enlarged in cervical and lumbar regions
- IC: Sensory input and motor output to FORELIMB - IL: Sensory input and motor output to HINDLIMB
What is filum terminale made of?
Fibrous tissue
Where is the spinal cords grey matter found?
At the center of the cord
What does the grey matter form in the center?
Forms a butterfly shape on cross-section
What is the grey matter made of?
Nerve cell bodies
What does the grey matter surround?
Grey matter surrounds the canalis centralis and connects the two halves of the d
Horns of the grey matter:
- Cornu dorsale
- Cornu laterale
- Cornu ventrale
What surrounds the GREY matter?
Fiber tracts, in other words WHITE matter surrounds the GREY matter
What do the fiber tracts consist of?
three paired peripheral funiculi
- Funiculus dorsalis
- terminates in brain. conducts ascending pathways
- Funiculus lateralis
- conducts ascending and descending pathways
- Funiculus ventralis
- conducts descending pathways + stimulates muscles and glands to contract = pyramidal tract
Commissura alba ?
Connective fibers between median fissure and grey matter
Formation reticularis ?
What does it regulate?
Mixture of white and grey matter. It is between dorsal and lat. horns. One of the oldest part of the barinstem.
Regulates: cardiovasc. system, breathing, habituation, pain modulation etc.
