S6 L1 Autonomic Innervation of the Head and Neck Flashcards
Remind of terminology, meaning of:
- Nucleus
- Ganglion
Autonomic (Visceral) Nervous System
- Sympathetic and Parasympathetic Nervous System:
- – Part of the ______ nervous system
- – Control is from?
- – Conscious control?
Part of the peripheral nervous system
Central control is from hypothalamus
Sympathetic nervous system- neuronal connections through brainstem and spinal cord
Controls body functions not under conscious control
Maintains and fine tunes internal environment: accelerator and brake
Sympathetic vs parasympathetic nervous system
- Role of each in related to head and neck
Sympathetic:
(Autonomic (Visceral) Nervous System - Sympathetic and Parasympathetic Nervous System)
- Structure of neurone arrangement (clue - 2 nerves)
- Target tissues are…
Autonomic Outflow of parasympathetic and sympathetic nerve fibres… (from which part of spinal cord?)
Sympathetic:
Autonomic Innervation of Head and Neck
- Sympathetic Innervation to Head and Neck
Draw out the pathway of all three neurones, where they synapse, the involvement of vessels, where the vessels are going…
Sympathetic:
Recap: Sympathetic Innervation to Head and Neck structures…
Sympathetic:
Key Anatomical Relations include Common and Internal Carotid Artery and Lung Apex
Pathology and/or injury involving… can interrupt sympathetic innervation to head and neck…
Clinical Manifestations of Interruption of Sympathetic Innervation to the Face and Eye
- Name of condition…
- Signs and symptoms…
Why does interruption of sympathetic innervation lead to partial ptosis and not a complete or severe ptosis?
Partial vs Severe or Complete Ptosis
Recap:
Summary of Sympathetic Innervation to Head and Neck Structures
Autonomic Innervation of the Head and Neck:
Parasympathetic Innervation to the Head and Neck
- Which 4 CN carry parasympathetic fibres from the brainstem?
- Route of these nerves to the target tissue…
III, VII, IX, X
Ocuolomotor, Facial, Glossophrayngeal, Vagus
Parasympathetic fibres for: CN III, CN VII
- Parasympathetic nuclei (in brainstem)?
- Parasympathetic ganglion
- Target tissue
Recap: Parasympathetics associated with CN III
- Route of this…
Oculomotor nerve (parasympathetic fibres) form efferent part of pupillary light reflex. - Describe the pupillary light reflex
Answer this Q:
A patient presents with anisocoria. You shine light in the RIGHT eye. The RIGHT pupil does not constrict but the LEFT pupil does. You shine light in the LEFT eye; the LEFT pupil constricts, but the RIGHT pupil does not. Where is the most likely lesion? Also, what does anisocoria mean?
Anisocoria = unequally size pupils
A: Efferent limb (oculomotor nerve), right eye
Parasympathetic Component of Facial Nerve
- What route does it follow with the parasympathetic fibres?
- Pre-ganglionic neurons arise from own nuclei within brainstem
- Axons exit brainstem with other axons forming facial nerve
- Run with facial nerve for short distance, into petrous bone
- Reach target tissues via two intrapetrous branches of facial nerve:
- Greater petrosal nerve (supplies lacrimal gland)
- Chorda tympani nerve (also transmits special sense taste from anterior 2/3 tongue) (supplies salivary gland, except parotid gland)
- Two associated parasympathetic ganglia
- Pterygopalatine ganglion
- Submandibular ganglion
Associated with CN IX and CN X, what is the:
- Parasympathetic nuclei?
- Parasympathetic ganglion
- Target tissue
Parasympathetic Component of Glossophrayngeal Nerve
Parasymapthetic Component of Vagus Nerve
Recap:
Parasympathetic Innervation to Head and Neck Summary
Summary: Parasympathetic Innervation to Head and Neck
Summary: Parasympathetic Nervous System in Head and Neck
Read through these group work and remember them
