Nervous System Prof. Abdulameer Al-Nuaimi E-mail: a.al-nuaimi@sheffield.ac.uk E. mail: abdulameerh@yahoo.com

Nervous System

Autonomic Nervous System

Autonomic nervous system

Medial side of the cerebral hemisphere Showing the Hypothalamus which is the higher centre for autonomic nervous system

Neuron

Neuron

Neurons

Synapse

Longitudinal fissure Cerebral hemisphere Cerebral Hemispheres

Lateral sulcus Cerebral hemisphere

Motor and sensory areas on the cerebral cortex

Lobes of Cerebrum

Ventricles of the brain

Functions of Cerebrospinal Fluid 1-Delivers nutrients from blood to the brain and spinal cord 2-Protects the brain and spinal cord 3-Removes the wastes from the brain and spinal cord 4-Shock absorber that reduces trauma.

Meninges of the brain and spinal cord

Meninges of the brain

Meninges of the brain and spinal cord Pia mater

Choroid plexus Subarachnoid space LV 3V Cerebral Aqueduct Blood superior Sagittal sinus Arachnoid villi LV 3V Interventricular foramen 4 V Cerebral Aqueduct

Brain Stem

Peripheral Nervous System 8 12 5 5 Peripheral Nervous System 1

Cranial Nerves Midbrain Pons Medulla oblongata

Number: 1 Olfactory nerve Type: Sensory Function: Sense of Smell Number: 2 Optic nerve Type: Sensory Function: Vision Number: 3 Oculomotor nerve Type: Motor Function: Raise eyelids, move eyes, regulate the size of pupils, focus of lenses. Cranial Nerves Number: 4 Trochlear nerve Type: Motor Function: Eye movements, proprioception Number: 5 Trigeminal nerve Type: Mixed Function: Sensations of the head and face, chewing movements, and muscle sense Number: 6 Abducent nerve Type: Motor Function: Produce movements of the eyes

Number: 7 Facial neve Type: Mixed Function: Facial expressions, secretion of saliva, taste. Number:8 Vestibulocochlear n Type: Sensory Function: Balance or equilibrium sense. Hearing. Number:9 Glossopharyngeal n Type: Mixed Function: Taste and other sensations of tongue, swallowing, secretion of saliva, aid in reflex control of blood pressure and respiration. Number: 10 Vagus nerve Type: Mixed Function: Transmit impulses to muscles associated with speech, swallowing, the heart, smooth muscles of visceral organs in the thorax, and abdomen. Number:11 Accessory Nerve Type: Motor Function: Turning movements of the head, movements of the shoulder and viscera, voice production. Number:12 Hypoglossal n Type: Motor Function: Tongue movements