6. Schematic view of the spinal nerve!!! For simplicity,
meningeal branch is not marked
7. Some important concepts Area radicularis sensitiva part of
the body, from which the sensory information is led by one dorsal
root of spinal nerve (or one cranial nerve) Consists of DERMATOM
(skin area) and internal organs and muscles area, innervated by the
same dorsal root.
8. Dermatom Dermatoms form longitudinal strips on the surface
of the body.
9. Some important concepts Area radicularis motorica (Myotom)
muscles innervated motorically by one ventral root of spinal nerve
(or one cranial nerve). (But one muscle can by also innervated by
more than one ventral roots of spinal nerves.) Area radicularis =
area radicularis sensitiva + area radicularis motorica
10. Some important concepts Area nervina part of the body
innervated by one peripheral nerve. Some nerves form nervous plexus
and here, as a peripheral nerve we mean the nerve distally to the
plexus from which it arises.
11. Nerve plexus Spinal nerve Dorsal branch (ramus posterior)
Ventral branch (r. anterior) Peripheral nerve Spinal cord segment
Nerve plexus is allways formed only by ventral branches of spinal
nerves!
12. Nerve plexuses are formed by ventral branches of: 1. nerves
C1-C4 Plexus cervicalis 2. nerves C5(C4)-Th1 Plexus brachialis 3.
nerves Th12-L4 Plexus lumbalis 4. nerves L4-S5(Co) Plexus sacralis
Picture from Petrovick a spol.: Systematick, topografick a klinick
anatomie
13. Difference between dermatom ( or generally area radicularis
sensitiva) and area nervina (sensitiva) Dermatom 1 Dermatom 2 Area
nervina (sensitiva) (Bodies of pseudounipolar neurons arent drawn
in this scheme.)
14. Autonomous nervous system Has two portions- sympathetic and
parasympathetic nervous system. Both of them are efferent (motor,
or more accurately visceromotor) and they innervate glands and
smooth muscles of internal organs and vessels.
15. Autonomous nervous system Both of them consist of two
neurons the first one is located in CNS, its axon runs to the
periphery and forms synapse with the second neuron, which is
located in the autonomous (sympathetic or parasympathetic)
ganglion.
16. Variants of sympathetic pathways. a.) b.) c.) d.)
17. Some additional details Dorsal root leads
somatosensory,
18. Some additional details Dorsal root leads somatosensory,
but also viscerosensory information.