Pathways Flashcards
(30 cards)
Somatosensory Pathway Neurons
First Order Neuron
Second Order Neuron
Third Order Neuron
First Order Neuron
Somatosensory Pathway
Cell Body in Dorsal Root Ganglion
From the sensory receptor to the dorsal horn, where it synapses with the second order neuron.
Enters spinal cord via dorsal root
Second Order Neuron
Somatosensory Pathway
Cell Body in Dorsal Horn
From the dorsal horn, up the spinal cord, to the thalamus
Third Order Neuron
Somatosensory Pathway
Cell Body in Thalamus
From thalamus to the primary somatosensory cortex
Somatic Motor Pathway Neurons
Upper Motor Neurons and Lower Motor Neurons
Upper Motor Neurons
Somatic Motor Pathway
Cell Body in Primary Motor Cortex
Conducts somatic motor output from the primary motor cortex to the spinal cord (where it terminates)
Lower Motor Neurons
Somatic Motor Neuron
Cell Body in Anterior (Ventral) Gray Horn
Takes output from the spinal cord to the skeletal muscle
Exits spinal cird via ventral root
Autonomic Nervous System Neurons
Pre-Ganglionic Neurons, Post-Ganglionic Neurons, Visceral Motor Neuron
Identify the Pathway
Sympathetic Nervous System
Neurotransmitter 1.
Acetylcholine
Neurotransmitter 2.
Acetylcholine
Neurotransmitter 1.
Acetylcholine
Neurotransmitter 2.
Noradrenaline
Identify The Pathway
Parasympathetic Nervous System
Sympathetic NS Vertebrae
Thoracolumbar Region
Parasympathetic NS Vertebrae
Craniosacral Region
Post Ganglionic Neurons
Autonomic Nervous System
- Unmeyelinated
- Synapses with effector/organ
- Excitatory OR inhibitory
Pre Ganglionic Neurons
Autonomic Nervous System
- Myelinated
- Releases ACH
- Always excitatory
Cholinergic Fibres - Function
Release AcH
Adronergic Fibres - Function
Release Noradrenaline
Cholinergic Receptor Types
Muscarinic Receptors, Nicotinic Receptors
Post Ganglionic Neurons - Sympathetic
Adrenergic Synapse (α₁, β₁, α₂, β₂)
Pre Ganglionic Neurons - Sympthetic
Cholinergic Synapse (Nicotinic Receptor)
Post Ganglionic Neurons - Paraympathetic
Cholinergic Synapse (Muscarinic Receptor)
