Download presentation
Presentation is loading. Please wait.
1
EXERCISE 19: BRAIN AND CRANIAL NERVES
2
FOREBRAIN MIDBRAIN HINDBRAIN
5
CEREBRUM Transverse Fissure
7
ON PARIETAL LOBE Primary somatosensory area
ON FRONTAL LOBE Primary motor area
8
Cortex (superficial) is gray matter White matter is deeper
9
DIENCEPHALON= thalamus + hypothalamus
10
Sensory Nerve Attachments
Optic nerves: to eyes Optic chiasm: cross Optic tracts: to brain
11
Endocrine Attachments
Pineal Gland
12
MIDBRAIN CORPORA QUADRIGEMINA
13
HINDBRAIN
14
HINDBRAIN--cerebellum
15
MENINGES Same setup as spinal cord— Dura mater most superficial,
Arachnoid, Pia mater closest to brain
16
CHOROID PLEXUSES Specialized capillaries in ventricles
Produce CSF—Circulates from here to central canal (s. cord) & around outside of brain/cord too
17
CRANIAL NERVES 12 pairs Connect to brain: CN I cerebrum CN II thalamus
CN III-XII brain stem O O O T T A F V G V A H S S M M B M B S B B M M Nerve names: Nerve functions:
18
CN I: OLFACTORY SENSORY Smell From olfactory epithelium
Olfactory nerve-bulb-tract (Cribriform foramina of ethmoid) 14-21
19
CN II: OPTIC SENSORY From retina Optic nerve-chiasm-tract
(Optic canal-sphenoid) 14-22
20
CN III: OCULOMOTOR Mostly MOTOR To eye muscles
(superior orbital fissures-sphenoid) 14-22
21
CN IV: TROCHLEAR Mostly MOTOR To superior oblique eye muscles
(superior orbital fissures-sphenoid) 14-22
22
CN V: TRIGEMINAL Mixed (sensory and motor) Ophthalmic Branch
Sensory-orbital, upper face structures Maxillary Branch Sensory-lower face structures Mandibular Branch Mixed-mouth
23
14-24
24
CN VI: ABDUCENS Mostly motor To lateral rectus eye muscles
(superior orbital fissure) 14-23
25
CN VII: FACIAL Mixed To parts of face
Expressions, tear/salivary glands 14-25
26
CN VIII: VESTIBULOCOCHLEAR
Sensory, from inner ear Vestibular branch Balance, equilibrium Cochlear branch Hearing 14-26
27
CN IX: GLOSSOPHARYNGEAL
Mixed to head and neck Sensory: posterior tongue Motor: pharyngeal muscles (swallowing), salivary gland 14-27
28
CN X: VAGUS Mixed to visceral organs, larynx, pharynx
Sensory: ear, diaphragm, organs Motor: pharynx, digestive, respiratory, cardiovascular systems 14-28
29
CN XI: ACCESSORY Join at foramen magnum Mostly motor
To muscles of neck, upper back Cranial root Fibers originate in medulla Spinal root Some motor fibers originate in spinal cord Join at foramen magnum 14-29
30
CN XII: HYPOGLOSSAL Mostly motor To tongue muscles 14-29
31
CRANIAL NERVES
33
Sheep Brain Dissections
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.