Lecture 2 Flashcards
What is the modes of communication of the Nervous System?
- Bioelectric Energy (attraction of opposite charges - pos and neg) that is generated at the cellular level
- Action Potentials
What does the CNS consist of?
Brain and spinal cord
What does the PNS consist of?
All the nerves that are an extension of the CNS
What does efferent mean?
Communication away from CNS
What does afferent mean?
Communication towards CNS
What are the divisions of the peripheral nervous system?
Somatic and Autonomic
What is the division of the Autonomic PNS?
Sympathetic and Parasympathetic
What is the somatic nervous system?
Voluntary control (i.e, moving arm)
What is the autonomic nervous system?
Done without thinking about it (breathing, heart rate, etc)
What is the sympathetic nervous system?
Carries signals regarding to the body’s “flight or fight” response (i.e, increased heart rate under mental stress)
What is the parasympathetic nervous system?
Returns the body back to its normal state (relaxes body after periods of stress)
Cerebral Cortex
Lobes named after cranial bones
Gyri
“Bumps” along the surface of the brain
Sulci
Small grooves between gyri
Fissures
Deep groves between gyri
What does the activation of neurons do?
Generate action potentials
What is the frontal lobe responsible for?
- Short- term memory
- Planning and control of movement
What is the central sulcus responsible for?
Separates pre-central and post-central Cyrus