Brain & Cranial Nerves Flashcards

1
Q

Central Nervous System (CNS)

A

Brain and spinal cord

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2
Q

Peripheral Nervous System (PNS)

A

Any nerve or ganglia outside of the CNS

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3
Q

Sensory/Afferent Division

A

Carries signals to the CNS

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4
Q

Motor/Efferent Division

A

Carries signals from the CNS to glands and muscle cells

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5
Q

Autonomic Nervous System (ANS)

A

Carries signals to glands, cardiac muscle, and smooth muscle. Responsible for visceral reflexes

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6
Q

Sympathetic Division

A

Arouses the body for action/fight-or-flight

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7
Q

Parasympathetic Division

A

Has calming effect on body/rest and digest

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8
Q

Dura Mater

A

Tough two-layered sheet of fibrous connective tissue

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9
Q

Subdural Space

A

Virtual space between the dura and arachnoid membrane

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10
Q

Arachnoid Mater

A

Web-like structure that secures blood vessels

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11
Q

Subarachnoid Space

A

CSF-filled space between the arachnoid mater and pia mater

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12
Q

Pia Mater

A

Thin shiny layer that adheres to the contours of the brain

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13
Q

Sulci/Sulcus

A

Shallow grooves

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14
Q

Fissures

A

Deep grooves that separate brain structures

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15
Q

Gyri/gyrus

A

Thick rounded folds

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16
Q

Cerebrum

A

Largest part of the brain

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17
Q

Central Sulcus

A

Divides the frontal and parietal lobes

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18
Q

Lateral Sulci

A

Separates the temporal and parietal lobes

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19
Q

Longitudinal fissure

A

Separates the left and right hemispheres

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20
Q

Transverse Fissure

A

Separates the cerebellum and the occipital lobe

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21
Q

Corpus Callosum

A

Connects the right and left hemispheres

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22
Q

Cerebral Cortex

A

Consists of the frontal, parietal, temporal, and occipital lobes

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23
Q

Frontal Lobe

A

Voluntary motor functions, motivation, foresight, planning, memory, mood, emotion, social judgment, and aggression

24
Q

Parietal Lobes

A

Primary site for receiving and interpreting signals of the general senses and taste

25
Temporal Lobes
Hearing, equilibrium, smell, learning, memory, and emotion
26
Occipital Lobe
Visual center of the brain
27
Diencephalon
Consists of the thalamus, hypothalamus, infundibulum, mammillary body, pineal gland, pituitary gland, and fornix
28
Thalamus
Relay center for sensory information
29
Hypothalamus
Major control center for regulation of homeostasis responses such as hormone secretion, autonomic effects, thermoregulation, and food/water intake
30
Infundibulum
Connects the hypothalamus to the pituitary gland
31
Mammillary body
Relay center for long-term memory
32
Pineal Gland
Regulates circadian rhythms and produces melatonin
33
Pituitary Gland
Works with hypothalamus to release/secrete hormones
34
Fornix
Connects hippocampus to mammillary body
35
Cerebellum
Contains the arbor vitae and more than half of all brain neurons (100 billion)
36
Arbor Vitae
Tree of life that brings sensory motor information to and from the cerebellum. Involved in fine motor skills, spatial perception, synchronizing muscular actions, timekeeping, and distinguishing pitch
37
Brain Stem
Contains the midbrain, pons, and medulla oblongata
38
Midbrain
Connects the diencephalon to the pons
39
Corpora Quadrigemina
Formed from superior (visual) and inferior (auditory) colliculi
40
Pons
Connects brain stem to cerebellum. Contains ascending sensory tracts and descending motor tracts
41
Medulla Oblongata
Connects spinal cord to pons and contains the cardiac, vasomotor, respiratory, and reflex centers
42
Ventricles of Brain
Spaces in brain occupied by CSF and allows the flow of CSF throughout the CNS
43
Order of flow for Ventricles
Lateral ventricles, interventricular Foramen, third ventricle, cerebral aqueduct, fourth ventricle, central canal
44
Olfactory Nerve (I)
Sensory nerve for smell
45
Optic Nerve (II)
Sensory nerve for vision
46
Oculomotor Nerve (III)
Motor nerve for eye movement (rectus muscles), opening of eyelid (levator palpebrae superioris), and pupil constriction
47
Trochlear Nerve (IV)
Motor nerve for eye movement (superior oblique muscle)
48
Trigeminal Nerve (V)
2 sensory divisions (ophthalmic and maxillary) and one mixed (mandibular). Sensory function of face and motor function of muscles of mastication
49
Abducens Nerve (VI)
Motor nerve for lateral movement of eye (lateral rectus muscle)
50
Facial Nerve (VII)
Mixed nerve with sensory function of taste on anterior 2/3 of tongue and motor function of various facial/neck muscles and glands
51
Vestibulocochlear Nerve (VIII)
Sensory nerve for hearing and balance
52
Glossopharyngeal Nerve (IX)
Mixed nerve with sensory function of taste, touch, pressure, pin, and temperature on posterior 1/3 of tongue. Motor function of salivation, swallowing, and gagging
53
Vagus Nerve (X)
Mixed nerve with sensory function of taste, hunger, and fullness and motor function of swallowing, speech, and regulation of heart & GI tract
54
Accessory Nerve (XI)
Motor nerve for swallowing, head, neck, and shoulder movements
55
Hypoglossal Nerve (XII)
Motor nerve of tongue movements for speech, food manipulation, and swallowing