11. Peripheral Nervous System Flashcards
Components of Nervous System
central NS
peripheral NS
Components of peripheral NS
- structures
- 2 types of nerves
- 2 types of NS
Nerve cell bodies + nerve Fibres ( CNS to structures)
- Cranial nerves
- Spinal nerves
1. Autonomous NS - Sympathetic
- Parasympathetic
2. Somatic NS
Components of Central NS
- Brain
1. Forebrain
2. Mid brain
3. Hindbrain - Spinal Cord
Forebrain components
Telencephalon
Diencephalon
Midbrain Component
Mesencephalon
Hindbrain
Metencephalon
Myelencephalon
- Telencephalon
Cerebral cortex
Basal ganglia
Hippocampus
Amygdala
- Diencephalon
Thalamus
Hypothalamus
- Mesencephalon
tectum
tegmentum
- Metencephalon
pons
cerebellum
- Myelencephalon
medulla
AFFERENT NEURON
sensory neuron - impulses from sensory receptors to CNS
- Visceral sensory fibre
- Somatic sensory fibre
EFFERENT NEURON
motor neuron - from CNS to muscles/gland
- Parasympathetic motor fibre of ANS (visceral)
- Sympathetic motor fibre of ANS (visceral)
- Motor fibre of somatic NS ( volunteer - skeletal muscles)
Spinal Cord
Major reflex centre + conduction pathway
length?
45 cm from FORAMEN MAGNUS to L1 lower border (newborn - upper of L3)
Spinal Cord Enlargement
Cervical Enlargement
Lumbar Enlargement
Cervical Enlargement
Brachial Plexus
Lumbar Enlargement
Lumbosacral Plexus
Conus Medullaris
lower tappering end of SC
Filum Terminale
condensation of Pia mater from lower end of SC to Co1
Cauda Equina
bundle of Lumbar and Sacral spinal nerve roots in subarachnoid space caudal to termination of spinal cord
