CNS, PNS and ANS and Lobes Flashcards
Three Membranes meninges
outer durameter, middle arachnoid, & inner piameter
Cerebro-spinal fluid
Between arachnoid and piameter
Two groups of PNS
Sensory-somatic or Cerebrospinal or Corticospinal and Autonomic
How many cerebrispinal nerves
12 cranial and 31 spinal pairs
Sympathetic system
Energy expenditure and fight or flight
Parasympathetic
Digestion and energy conservation
3 major sulci
Central sulcus, parieto occiptal sulcus, sylvian or lateral fissure
Insular Lobe
Deep to the brain’s lateral surface
Association fibers
Connect various areas within cerebral hemispheres
Commisural fibers
Connect the two hemispheres
Projection fibers
Connect the cerebrum to lower centers of CNS
Postcentral gyrus
Somatosensory Cortex
Precentral gyrus
Motor Cortex
Calcarine Fissure
Within occipital lobe
Gyri of Frontal Lobe
Precentral, superior, middle, inferior
Premotor Cortex function
Responsible for complex and skilled movements required for speech, hand manipluations, and eye-hand co-ordination
Prefrontal Cortex function
Cognitive functions such as reasoning, thinking, pragmatism, planning
Inferior front gyrus function
Important for speech production
Lesions to frontal lobe
impairment of memory, inattentiveness, behavior disorders, difficulty in learning new info.
Parietal Lobe function
Perception of somatic sensation, and spatial orientation, memory
Postcentral gyrus
Primary sensory cortex
All sensations received at primary sensory cortex are sent to:
Sensory association areas before awareness reached
Pathologies of pariental lobe
Contralateral sensory loss, perceptual disorders
Temporal Lobe, three gyri
Superior, middle and inferior