1What are the major functions of the brain?
Maintaining homeostasis, controlling autonomic and endocrine systems, emotion, movement, sensory perception, and higher-order tasks
2What does maintaining homeostasis involve?
Regulating body temperature, breathing, heart rate, and other vital activities
3Which brain system is associated with emotion?
The limbic system
4What are examples of higher-order brain functions?
Memory, intelligence, and consciousness
5Approximately how many neurons does the adult brain contain?
86 billion neurons
6How many synapses does the adult brain contain?
Trillions of synapses
7What are the four major parts of the brain?
Brain stem, cerebellum, diencephalon, and cerebrum
8Which structures make up the brain stem?
Medulla oblongata, pons, and midbrain
9What are the three major structures of the diencephalon?
Thalamus, hypothalamus, and epithalamus
10What is another name for the cerebrum?
Cerebral hemispheres
11What is the cerebral cortex?
The outer layer of the cerebrum
12Which structures collectively form the brain stem?
Medulla oblongata, pons, and midbrain
13What connects the brain stem to the spinal cord?
The brain stem is continuous with the spinal cord
14What is the primary pathway function of the brain stem?
It carries tracts between the cerebrum and spinal cord
15Which brain regions communicate through the brain stem?
Cerebrum, cerebellum, and spinal cord
16How many pairs of cranial nerves are associated with the brain stem?
10 of the 12 pairs
17What automatic survival behaviors are associated with the brain stem?
Breathing, heart rate, and auditory and visual reflexes
18Where do most sensory signals entering the brain travel?
Through cranial nerves or spinal nerves via the spinal cord and brain stem
19How do motor commands leave the brain?
Through cranial nerves or spinal nerves via the brain stem and spinal cord
20What are the two major types of tracts in the brain stem?
Ascending and descending tracts
21What is the direction of ascending tracts?
From the spinal cord toward the cerebrum
22What is the direction of descending tracts?
From the cerebrum toward the spinal cord
23What are tracts?
Bundles of nerve fibers that carry signals between nervous system regions
24What are nuclei in the brain stem?
Clusters of neuronal cell bodies that process or relay information
25What are the three major regions of the brain stem?
Medulla oblongata, pons, and midbrain
26What does the medulla oblongata connect?
The spinal cord to higher brain regions
27What two major structures does the medulla oblongata contain?
Tracts and nuclei
28What are medullary pyramids associated with?
Descending motor tracts in the medulla oblongata
29What do cerebellar tracts connect?
The brain stem and cerebellum
30What is the main function of the medulla oblongata's nuclei?
Controlling vital reflexes and autonomic responses
31Which cardiovascular functions are controlled by the medulla oblongata?
Heart rate and blood pressure
32Which respiratory functions are controlled by the medulla oblongata?
Breathing rate and depth
33Which reflexes involve nuclei in the medulla oblongata?
Sneezing, coughing, vomiting, and hiccupping
34What is the role of some medullary nuclei in sensory processing?
Relaying sensory information to and from the cerebrum
35Which type of responses are medullary nuclei typically involved in?
Autonomic, involuntary responses
36How does the medulla oblongata influence heartbeat?
Its cardiovascular center adjusts heart rate through nuclei
37What does the word pons mean?
Bridge
38Where is the pons located?
Anterior to the cerebellum
39What is the appearance of the pons?
A bulging region of the brain stem
40What types of tracts pass through the pons?
Ascending and descending tracts
41Which structure is connected to the pons by tracts?
The cerebellum
42What is the role of pontine nuclei in communication?
Connecting and relaying information between the cerebellum and cerebrum
43What is another function of pontine nuclei?
Relaying sensory information
44How does the pons contribute to breathing?
Its respiratory center works with the medulla to maintain rhythmic breathing
45Where is the midbrain located?
Between the pons and diencephalon
46What are the two main functions of midbrain pathways and nuclei?
Conducting signals through tracts and relaying information through nuclei
47Which structures are connected to the midbrain by cerebellar tracts?
The cerebellum
48What types of tracts pass through the midbrain?
Ascending and descending tracts
49Which response is associated with midbrain nuclei?
The fight-or-flight response
50Which reflexes are associated with the midbrain?
Auditory and visual reflexes
51What is the corpora quadrigemina?
A group of four elevations in the dorsal midbrain involved in visual and auditory reflexes
52What do the superior colliculi control?
Visual reflexes
53What do the inferior colliculi control?
Auditory reflexes
54What does cerebellum mean?
Little brain
55What is the second-largest region of the brain?
The cerebellum
56Where is the cerebellum located?
Dorsal to the pons and medulla
57How many cerebellar hemispheres are there?
Two
58What are the three main regions of the cerebellum?
Cerebellar cortex, arbor vitae, and deep cerebellar nuclei
59What is the primary function of the cerebellum?
Providing precise timing and appropriate patterns of skeletal muscle contraction
60Which motor functions does the cerebellum coordinate?
Movement coordination, balance, and posture
61What type of memory is associated with the cerebellum?
Motor memory
62How does the cerebellum contribute to movement planning?
It receives planned movements from the cerebrum
63What information does the cerebellum use to adjust movements?
Planned movements and current body position
64What does the cerebellum send back to the cerebrum?
Adjustments that fine-tune motor movements
65What body information does the cerebellum continuously receive?
Information about body position
66Why are babies' movements often uncoordinated?
Their cerebellums are underdeveloped
67What is the arbor vitae?
The white matter of the cerebellum
68What is the function of the arbor vitae?
Carrying sensory and motor information to and from the cerebellum
69What is the function of the cerebellar cortex?
Coordinating movement
70What is the vermis?
The medial connection between the cerebellar hemispheres
71What does the vermis connect?
The left and right cerebellar hemispheres
72What does the term vermis mean in relation to its appearance?
Worm
73What forms the central core of the forebrain?
The diencephalon
74What surrounds the diencephalon?
The cerebrum
75Which structures are found in the diencephalon?
Thalamus, hypothalamus, and epithalamus
76How many thalami are there?
Two, one on each side
77How many hypothalami are there?
Two, one on each side
78What type of matter predominates in the diencephalon?
Gray matter
79What is gray matter primarily composed of?
Neuronal cell bodies, dendrites, and synapses
80What is the primary function of the thalamus?
Relaying incoming sensory information to the cerebral cortex
81Which sensory modality bypasses the thalamus as the usual relay to the cerebral cortex?
Olfaction, or smell
82What is the general thalamic relay rule?
Signals communicating with the cerebral cortex generally relay through a thalamic nucleus, except olfaction
83What does the word hypothalamus mean?
Below the thalamus
84How does the hypothalamus regulate the autonomic nervous system?
It controls involuntary physiological responses, including stress responses
85How does the hypothalamus regulate the endocrine system?
By controlling the pituitary gland
86Which basic drives are regulated by the hypothalamus?
Thirst, hunger, and satiety
87Which aspect of temperature regulation is controlled by the hypothalamus?
Body temperature
88Which sleep-related function does the hypothalamus regulate?
Sleep-wake cycles
89Which emotional and behavioral functions does the hypothalamus regulate?
Emotional responses and behaviors related to feeding and sex
90Which hypothalamic structures are associated with memory?
Mammillary bodies
91What is the infundibulum?
The stalk connecting the hypothalamus to the pituitary gland
92What is the most posterior part of the diencephalon?
The epithalamus
93Which endocrine gland is located in the epithalamus?
The pineal gland
94What hormone does the pineal gland produce?
Melatonin
95What is the role of melatonin?
Regulating sleep-wake cycles
96How does the hypothalamus influence melatonin production?
It signals the pineal gland to produce melatonin
97What is the interthalamic adhesion?
A structure connecting the right and left thalami
98What is another name for the interthalamic adhesion?
Intermediate mass of the thalamus
99What are the mammillary bodies?
Hypothalamic nuclei associated with memory
100Where are the mammillary bodies located?
Below the hypothalamus and above the pons
101What is the pituitary gland commonly called?
The master gland of the endocrine system
102Is the pituitary gland part of the hypothalamus?
No, it lies below the hypothalamus and is controlled by it
103What structure connects the pituitary gland to the hypothalamus?
The infundibulum
104What is another name for the pineal gland?
Pineal body
105Where is the pineal gland located relative to the corpora quadrigemina?
Above the corpora quadrigemina