《医药学基础》课程教学课件（PPT讲稿）The Nervous System

The Nervous System College of Life Sciences Yuting Cui

The Nervous System College of Life Sciences Yuting Cui

Introduction The nervous system is a master system in the living body;it regulates and integrates the activities of all the bodily systems for the benefit of the organism as a whole. Central c Brain Nervous System The Nervous Spinal Cord System Peripheral ICranial Nerves(12 pairs) Nervous SystemSpinal Nerves(31 pairs)

Introduction Central Nervous System The Nervous System Peripheral Nervous System Brain The nervous system is a master system in the living body; it regulates and integrates the activities of all the bodily systems for the benefit of the organism as a whole. Spinal Cord Cranial Nerves (12 pairs) Spinal Nerves (31 pairs)

Introduction Sensory Nerves Somatic Sensory Nerve (Afferent Nerves)Visceral Sensory Nerve The Nervous System Motor Nerves Somai (Skeletal Muscle) Motor Nerve (Efferent Nerves) Visceral [Sympathetic Nerve Motor Nerve Parasympathetic (Cardiac Muscle、 Nerve Smooth Muscle、Gland)

Introduction Sensory Nerves (Afferent Nerves) The Nervous System Motor Nerves (Efferent Nerves) Somatic Sensory Nerve Visceral Sensory Nerve Somatic Motor Nerve Visceral Motor Nerve (Cardiac Muscle、 Smooth Muscle、Gland) (Skeletal Muscle) Sympathetic Nerve Parasympathetic Nerve

Spinal Cord The spinal cord,a long cylindrical structure,is located in the vertebral canal and invested by meninges.It extends from the foramen magnum,where it continues with the medulla oblongata. In transverse section,the spinal cord is seen to consist of the gray matter and the white matter.The gray matter of the spinal cord is centrally located and is surrounded by the white matter

Spinal Cord In transverse section, the spinal cord is seen to consist of the gray matter and the white matter. The gray matter of the spinal cord is centrally located and is surrounded by the white matter. The spinal cord, a long cylindrical structure, is located in the vertebral canal and invested by meninges.It extends from the foramen magnum, where it continues with the medulla oblongata

Spinal Cord Thirty-one pairs of spinal nerves arise from the spinal cord and pass through the intervertebral foramina between adjacent vertebrae of the vertebral column. Each portion of the cord that gives rise to a pair of spinal nerves is called a spinal segment.Each spinal segment is functionally correlated with the related cutaneous area,skeletal musculature and viscera

Spinal Cord Thirty-one pairs of spinal nerves arise from the spinal cord and pass through the intervertebral foramina between adjacent vertebrae of the vertebral column. Each portion of the cord that gives rise to a pair of spinal nerves is called a spinal segment. Each spinal segment is functionally correlated with the related cutaneous area, skeletal musculature and viscera

Functions of Spinal Cord One of the principal functions of the spinal cord is to convey afferent impulses which initiates from the somatic and visceral receptors to the brain and to conduct efferent impulses from the brain to the effectors. A second principal function is related to the reflexes.It plays the part of the center of the segmental reflex arc,e.g. the stretch reflex,the reflex of bladder and rectal emptying

Functions of Spinal Cord One of the principal functions of the spinal cord is to convey afferent impulses which initiates from the somatic and visceral receptors to the brain and to conduct efferent impulses from the brain to the effectors. A second principal function is related to the reflexes. It plays the part of the center of the segmental reflex arc, e. g. the stretch reflex, the reflex of bladder and rectal emptying

Pons Medulla Oblongata

Medulla Oblongata Pons

The Brain The brain (encephalon)is one of the organs of the body, weighing about 1,400g. Medulla Oblongata Brain Stem Pons (Midbrain Brain Cerebellum Regulate muscle movement. Diencephalon The second of large portion of the brain. Telencephalon Consists of right and left cerebral hemispheres

The Brain The brain (encephalon) is one of the organs of the body, weighing about 1,400g. Brain Brain Stem Medulla Oblongata Cerebellum Diencephalon Telencephalon Pons Midbrain Regulate muscle movement. The second of large portion of the brain. Consists of right and left cerebral hemispheres