nervous system
receives, interprets, and responds to signals from outside environment and internal body signals
What is included in the nervous system?
brain, brain stem, spinal cord, nerves / sensory receptors
central nervous system
interprets and sends out responses (brain sends signals through spinal cord to peripheral nervous system)
brain
controls body in thoughts, emotions, behaviors, memories and involuntary movements
frontal lobe
anterior; planning, organizing information, behavior emotions
temporal lobe
on the sides; stores long-term memory, language
parietal lobe
superior posterior; sensory and visual info
occipital lobe
lower posterior; sensory info from the eyes
spinal cord
pathway that connects the brain to the nerves
peripheral nervous system
nerves that send out and receive signals to/from the central nervous system
nerve signals
electrochemical signals that detect and respond to stimuli from the outside world, controls bodily functions
concussion
head impact leads to traumatic brain injury
What are the symptoms of concussion?
headache, dizzy, cognitive/memory deficits, light sensitivity, ears ring, emotional irregularity, nausea
traumatic brain injury (TBI)
outside force to head leads to brain disfunction
chronic traumatic encephalopathy (CTE)
progressive degeneration/ death of nerve cells from repeated head injury
histology
the study of the microscopic anatomy of tissues
Who performs histology?
a medical examiner in the gross examination and a forensic histologist in the microscopic examination
nervous tissue
nervous system; neurons transmit, interpret, and respond to signals
types of muscle tissue
skeletal, smooth, cardiac
skeletal muscle tissue
attaches bones
smooth muscle tissue
organ lining
cardiac muscle tissue
in heart
epithelial tissue
makes up organ and blood vessel outer layers; sheets connected to absorb, secrete, protect, and sense
connective tissue
connects other tissues like the muscles, bones, joints; keeps organs in place; helps tissues stretch