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Lecture 3

SPHR 2106 Lecture Notes - Lecture 3: Angular Gyrus, Visual Cortex, Astereognosis

Speech and Hearing Science
Course Code
SPHR 2106

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Primary motor cortex:41
Broadmann’s area
Auditory cortex:41,42
Primary sensory cortex:
wernicke’ s area: 22
CNS: made up of brain, brain stem and spinal cord
Protected by bones, meninges( layers) and CSF
PNS: encompasses somatic nervous system, autonomic nervous system
Cranial and spinal nerves
goes out from and comes into the CNS
Spinal nerves: afferent and efferen
Outgoing nerves: efferent
Sensory information: comes into the CNS (afferent)
Nerves (peripheral nervous system) do not stay within the CNS: innervate organs, muscles,
joints and skin
Innervate Arms, legs and trunk:
Innervates muscles of face head and neck: CNS from brain stem to innervate those muscles
Sensory nerves: hearing, vision, taste, smell (head and neck information)
Cranial nerves: motor and sensory
spinal cranial nerve innervate organs, laryngeal areas
Somatic vs autonomic nervous system
Somatic: everything conscious of
Autonomic: everything autonomic (heart pulse)
Autonomic nervous system
Sympathetic system: fight or flight system
Parasympathetic system: back to normal levels after sympathetic activation (reduces heart rate,
tells sweat glands to turn off)
Primary Brain Divisions
Forebrain: consist of cerebral hemispheres, basal ganglia and limbic lobe
Diencephalon: thalamus and hypothalamus
Telencephalon (cerebral hemisphere)
Hindbrain: pons, medulla oblongata
Brain stem: midbrain, pons, medulla
Central Nervous System starts off as hollow tube: contains cerebrospinal fluid
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