Powerpoints Chapter 3 Flashcards
Autonomic nervous system
Controls the heart, intestines, and other organs
Somatic nervous system
Consists of axons conveying messages from the sense organs to the CNS and from the CNS to the muscles
Dorsal=
Sagital=
Ventral=
Contralateral=
Back
Front to back
Front
When one side controls the opposite side
Part of the CNS found within the s….. Column
- communicates with the…..
- dorsal roots carry?
- ventral roots carry?
- dorsal root ganglia?
Part of the CNS found within the spinal column
- communicates with the sense organs and muscles, except those of the head
- entering dorsal roots= carry sensory information
- exciting ventral roots= carry motor information
- dorsal root ganglia= cell bodies of the sensory neurons that are located outside the spinal cord
The spinal cord consists of two types of matter:
1) grey matter
2) white matter
Each segment sends s…… Information to the brain and receives motor commands
1) grey matter=
- is densely packed with cell bodies and dendrites
- located in the center of the spinal cord
2) white matter=
- composed of mostly myelinated axons
- carries information from the gray matter to the brain
- or to other areas of the spinal cord
Each segment sends sensory information to the brain and receives motor commands
Two subsystems of the autonomic nervous system?
Sympathetic
-composed of ganglia on the left/right of the spinal cord
Parasympathetic
- dominant during relaxed states
- composed of long preganglion axons extending from the spinal cord
- and short postganglionic fibers that attach to the organs themselves
Neurotransmitters in the ANS
-postganglionic axons
Mostly release a…………
-sympathetic nervous system mostly uses..?
N………….
-postganglionic axons=
Axons of the parasympathetic nervous system mostly release acetylcholine as a neurotransmitter
-sympathetic nervous system mostly uses norepinephrine
The hindbrain
Consists of the (3)
M, p, c
Located at?
Hindbrain structures, the midbrain, and other central structures of the brain combine and make up the…?
Consists of
- medulla
- pons
- cerebellum
Location
-Posterior portion of the brain
Hindbrain structures, the midbrain, and other central structures of the brain combine and make up the…?
-Brain stem
The hindbrain- the medulla and the cranial nerves
The medulla is located?
The cranial nerves
-allow the medulla to control sensations from the..?
Medulla
-located just above the spinal cord
Like an enlarged extension of the spinal cord
The cranial nerves
-allow the medulla to control sensations from the
Head, muscle movements in the head, and many parasympathetic outputs
The hindbrain- Pons
Location?
Definition?
Location
-on each side of the medulla
(Ventral and anterior)
Axons from each side of the brain cross to the opposite side of the spinal cord
-left controls the right side, Ect.
The hindbrain- the cerebellum
Helps regulate..?
Also important for..?
Structure in the hindbrain with many deep folds
Helps regulate motor movement, balance and coordination
Important for shifting attention between auditory and visual stimuli
-selective attention
The midbrain
Contains…
T…..
Superior c……… And inferior c………
T……..
S……… N….
Dopamine allows us to have..?
Tectum
-roof of the midbrain
Superior colliculus and inferior colliculus
-processes sensory information
Tegmentum
-contains nuclei for cranial nerves and part of the reticular formation
Substantia nigra
-gives rise to the dopamine-containing pathway facilitating readiness for movement
Dopamine allows us to have motor control
The forebrain
The most a……. And p…….. Part of the mammalian brain, with two c……. H……….
-consists of the o…. C….. And s………. R……
-outer portion is known as the c……. C…..
Outer portion=primary lobes
-each side receives s…… I………. And controls the opposite (c…………) side of the body
The most anterior And prominent Part of the mammalian brain, with two cerebral Hemispheres
-consists of the outer Cortex And subcortical Regions
-outer portion is known as the cerebral Cortex
Outer portion=primary lobes
-each side receives sensory information And controls the opposite (contralateral) side of the body
