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Form & Function 1 > Lecture 36 - Autonomic Nervous System Anatomy > Flashcards

Lecture 36 - Autonomic Nervous System Anatomy Flashcards

1
Q

what are the 4 basic functions a neuron has

A
  1. general sensory
  2. special sensory
  3. somatic motor
  4. autonomic
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2
Q

Describe a somatic motor nerve

A
  • innervate striated muscle
  • conscious and reflex control
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3
Q

A motor unit consists of what

A

somatic motor neuron and all the muscle fibers it stimulates

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4
Q

what muscles do the autonomic motor neurons innervate

A

smooth, cardiac, and glands

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5
Q

T/F: autonomic motor neurons are under unconscious control

A

TRUE

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6
Q

T/F: autonomic motor neurons are usually a single neuron from the spinal cord to the target structure

A

FALSE - that’s somatic motor neurons; there are 2 neurons in autonomic

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7
Q

What are the boundaries of the thoracic cavity

A

cranial - thoracic inlet
dorsal - thoracic vertebral column
lateral - ribs & intercostal mm.
ventral - sternum
caudal - thoracic outlet

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8
Q

what are the boundaries of the thoracic inlet

A

T1, 1st rib, 1st sternebrae

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9
Q

what are the boundaries of the thoracic outlet

A

T13, 13th rib and costal arch, 8th sternebrae, diaphragm

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10
Q

what innervates the diaphragm

A

phrenic nerve

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11
Q

what rib border do the intercostal nerves run down

A

caudal

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12
Q

Describe the phrenic nerves (origin and innervation)

A

origin: ventral branches of C5-7
innervation: diaphragm

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13
Q

Describe the vagus nerves (origin, subdivision, and components)

A

origin: vasosympathetic trunk

subdivision: recurrent laryngeal n.

components: sensory, special sensory, somatic motor, and autonomic

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14
Q

sympathetic is usually referred to as

A

fight or flight

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15
Q

parasympathetic is usually referred to as

A

rest and relax

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16
Q

T/F: the autonomic nervous system has preganglionic and postganglionic neurons

A

TRUE

17
Q

what are the origins of the parasympathetic preganglionic neurons

A

cranial nerves - 3, 7, 9, 10
sympathetic - S1-3

18
Q

what are the origins of the sympathetic preganglionic neurons

A

T1-L3

19
Q

in the parasympathic, preganglionic neurons are ____ while postganglionic are ____. sympathetic are the opposite

A

long; short

20
Q

T/F: all parasympathetic innervation in the neck, thorax, and abdomen is handled by the vagus nerve

A

TRUE

21
Q

describe the location of terminal ganglia

A

within the wall of the target organ

22
Q

Name the ganglia of the sympathetic trunk (cranial to caudal)

A
  1. cranial cervical
  2. middle cervical
  3. cervicothoracic
  4. celiac
  5. cranial mesenteric
  6. caudal mesenteric
23
Q

boundaries of the abdominal cavity

A

cranial - diaphragm
dorsal - lumbar vertebrae & hypaxial mm.
ventral - abdominal wall m.
caudal - pelvic inlet

24
Q

what are the diaphragm openings? what runs through these?

A
  1. aortic hiatus - aorta, azygous v., thoracic duct
  2. esophageal hiatus - esophagus, ventral and dorsal vagal trunks
  3. caval foramen - caudal vena cava
25
Q

what makes up the celiacomesenteric ganglia

A

celiac ganglia + cranial mesenteric ganglia

26
Q

T/F: ganglia are sympathetic

A

TRUE

27
Q

T/F: nerves that pass through the ganglia are parasympathetic

A

FALSE - both sympathetic and parasympathetic

28
Q

what are the boundaries of the pelvic cavity

A

cranial - pelvic inlet
caudal - trunk

29
Q

what does the celiacomesenteric g. and pl. innervate

A

autonomic to foregut and midgut

30
Q

what does the caudal mesenteric g. and pl. innervate

A

autonomic to hindgut

31
Q

what meets at the pelvic plexus

A

hypogastric n. and pelvic n.

32
Q

describe the genitofemoral n.

A

innervates scrotal structures in males and skin of inguinal region in both sexes

33
Q

what does the pudendal nerve give rise to

A
  1. caudal rectal n.
  2. perineal n.
  3. dorsal n. of penis/clitoris
34
Q

T/F: micturition is under sympathetic, parasympathetic, and somatic control

A

TRUE

Form & Function 1 (55 decks)

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