1 - Zill - Autonomic Nervous System

Question 1

Autonomic Nervous System

Visceral Motor v. Visceral Sensory

Answer 1

Visceral Nervous System

Involuntary, Unconscious part of nervous system

Visceral Motor (parasympathetic / sympathetic Efferents) - innervate smooth and cardiac muscle, blood vessel, glands, and internal organs; unconscious

Visceral Sensory (Afferents) - imprecise localixation of sensation

Question 2

Ganglia Orientation - Sympathetic vs Parasympathetics

Answer 2

Sympathetic - Short Pre, Long Post

Parasympathetic - Long pre, Short Post

Question 3

Divergence

Answer 3

One pre-ganglionic neuron can innervate many post-ganglionic neurons

Ex. Many sweat glands are actiavted at once

Question 4

Sympathetics

Exit?

Ganglia Location?

Parasympathetics

Exit?

Ganglia Location?

Answer 4

Sympathetics

Exit - Thoraco Lumbar Levels (to head T1 - T2)

Ganglia - Near CNS

Parasympathetics

Exit - Craniosacral Levels

Ganglia - Near targets

Question 5

System: Sympathetics Parasypathetics

Heart:

GI:

Salivary:

Answer 5

System: Sympathetics Parasypathetics

Heart: Increase Decrease

GI: Decrease Increase

Salivary: Decrease Increase

Question 6

Sympathetic Innervation Targets?

What important gland are only innervated by sympathetics?

Answer 6

1. Skin
2. Peripheral Blood Vessels
   - - -

Sweat glands

Question 7

Parasympathetic Innervation

Answer 7

NOT Body wall, mainly organs

Question 8

What is main organ control of Sympathetic Function?

Answer 8

Hypothalmus

Question 9

What two pathways do sympathetics get to the skin?

Answer 9

1. In Thorax, exit and can synapse in the ganglion at that level
2. In Thorax, com out and ascene or descen chain of ganglia

Question 10

Sympathetic Path to Head

Answer 10

Preganglionic - T1, T2 - Leaves and Ascends chain

Postganglionic - In Superior Cervical Ganglia

- - -

To Target Organ: Joins Plexus on Internal and External Carotid Arties in Unnamed branches

Question 11

Horner’s Syndrome

Damage to what pathway?

Symptoms?

Answer 11

Damage: Sympathetic Pathway

Symptoms:

1. Miosis (constricted pupil) - Dilator Pupil M. - Radial smooth muscle
2. Ptosis (drooping eyelid) - Levator Palpebrae Superioris
3. Anhydrosis (lack of sweating)

Question 12

Oculomotor Nerve Palsy vs Horner’s Syndrom

Answer 12

Oculomotor:

• Dilated pupil (Mydriasis), denervate constrictor
• Eye movements lost (some)
• Accomodation lost

Horner’s (Sympathetics)

• Constricted pupil (Miosis), denervate Pupillary dilator
• Anhydrosis (no sweat)
• • -

BOTH Eyelid droop