Chapter 9 functions Flashcards
arachnoid mater
protects brain; absorbs cerebrospinal fluid
pia mater
protects brain
cerebrum
perception, cognition, memory, initiates voluntary movement
frontal lobe
voluntary motor activity, speech, thinking
parietal lobes
integrate sensory input form body’s surface about cold, heat, touch, pressure, and pain
temporal lobes
receive sensory input about sound
occipital lobes
process visual sensory input
corpus callosum
fibers connect the cerebral hemispheres
olfactory tracts
carry sensory input about smell
olfactory bulbs
receive sensory input from CN I (olfactory nerve)
thalamus
integrates all types of sensory input and relays it to the cerebrum
hypothalamus
integrates many homeostatic functions; secretes neurohormones
infundibulum
connects the hypothalamus and the posterior pituitary gland
pineal gland
secretes melatonin
optic nerves
carry sensory input about vision
optic chiasm
some optic nerve fibers cross here
optic tracts
carry sensory input about vision
corpora quadrigemina
has visual and auditory reflex centers; attachment site of CN IV (trochlear)
cerebral peduncles
contain fibers that carry motor output from the cerebrum to other regions of CNS; attachment site of CN III (oculomotor)
cerebellum
smooths and coordinates skeletal muscle movements
pons
has respiratory centers and fiber tracts that connect the cerebrum to the cerebellum and to the spinal cord; attachement site of CN V, VI, VII (trigeminal, abducens, facial)
medulla oblongata
controls respiration and heart rate; fiver tracts carry motor output from midbrain to spinal cord; CN VIII attaches at pons medulla border; CN IX, X, XI, XII attach to the medulla oblongata
dura mater
protects the spinal cord
arachnoid mater
protects spinal cord and absorbs cerebrospinal fluid
pia mater
protects the spinal cord
dorsal roots
fibers carry sensory input
dorsal root ganglia
location of sensory neuron cell bodies
ventral roots
fibers carry motor output
cervical spinal nerves
convey sensory input and motor output
cervical enlargement
attachment site of the nerves innervating the upper limbs
dural septa
prevent excessive movement of the brain within the cranial cavity
CN I, olfactory
olfaction (smell)
CN II, optic
vision
internal carotid arteries
supply the orbits and 80% of the brain (cerebrum)
CN III, oculomotor
eye movement, pupil constriction, focusing
CN IV, trochlear
eye movment
CN V, trigeminal
mastication and sensation from face
CN VI, abducens
lateral eye movement
CN VII, facial
facial expression and gustation (taste)
CN VIII, vestibulocochlear
audition, equilibrium
CN IX, glossopharyngeal
gustation, sensation from pharynx (throat), and swallowing
CN X, vagus
gustation, visceral sensation, and visceral muscle movement
CN XI, accessory
move head and shoulders
CN XII
tongue movement (swallowing and speech)
vertebral arteries
supply the cervical part of the spinal cord and the brain with blood
external auditory meatus
passageway for sound waves
mastoid process
attachment of digastric and sternocleidomastoid muslces
condylar process
articulates with the mandibular fossa
coronoid process
attachment of temporalis muscles
mental foramen
blood vessel and nerve passageway
temporal fossa
attachment of temporalis muscle
zygomatic arch
attachment of masseter muscle
styloid process
ligaments and tendons attach here
orbit
muscle attachment and protects eye
optic canal
Cranial nerve passageway for CN II (optic)
superior orbital fissure
cranial nerve passageway for CN III, IV, V-1 and VI
nasal cavity
air passageway
hard palate
separates the oral and nasal cavities
mandibular fossa
articulates with the condylar process
carotid canal
blood vessel passageway
stylomastoid foramen
cranial nerve passageway CN VII
foramen magnum
spinal cord passageway
occipital condyle
articulates with the atlas
external occipital protuberance
attachment of trapezius muscle
superior nuchal line
attachment of trapezius muscle
crista galli
attachment of dura mater
cribiform plate
cranial nerve passageway CN I (olfactory)
sella turcica
location of the pituitary gland
foramen rotundum
cranial nerve passageway CN 5-2
foramen ovale
cranial nerve passageway CN 5-3
internal acoustic meatus
cranial nerve passageway CN 5 and 8
jugular foramen
cranial nerve passageway CN 9, 10, 11
hypoglossal canal
cranial nerve 12 passageway
vertebral canal
passageway for spinal cord
intervertebral foramina
passageway for spinal nerves
vertebral body
bears weight and articulates with adjacent vertebral bodies
dens
articulates with the atlas
vertebral arch
protects spinal cord
spinous process
muscle attachment
bifid spinous process
muscle attachment
transverse processes
muscle attachment
transverse foramina
passageways for vertebral arteries and veins
superior articular facets
articulate with the inferior articular faces of superior vertebrae
inferior articular facets
articulate with the superior articular facets of inferior vertebrae
temporalis
elevates and retracts mandible
masseter
elevates the mandible
orbicularis oculi muscles
closes an eyelid
orbicularis oris muscle
closes, purses, and protrudes the lips
zygomaticus major
smiling
levator anguli oris
elevates the corner of the mouth
levator labii superioris
elevates the upper lip
depressor anguli oris
depresses the corner of the mouth
depressor labii inferioris
depresses the lower lip
buccinator
flattens a cheek against the teeth as in sucking and whistling
sternocleidomastoid
contraction of both flexes the neck, contraction of one rotates the head
digastric
depresses the mandible and elevates the hyoid
sternohyoid
depresses the hyoid and larynx
omohyoid
depresses the hyoid
sternothyroid
depresses the larynx and hyoid
thyrohyoid
depresses the hyoid and raises the larynx
trapezius
extends the head