ملخص/تفاصيل

Double dissociation of the anterior and posterior dorsomedial caudate-putamen in the acquisition and expression of associative learning with the nicotine stimulus

Charntikov, Sergios.   The University of Nebraska - Lincoln ProQuest Dissertations Publishing,  2015. 3689021.

الخلاصة (الملخص)‏‏

Tobacco use is the leading cause of preventable deaths worldwide. This habit is not only debilitating to individual users but also to those around them (second-hand smoking). Nicotine is the main addictive component of tobacco products and is a moderate stimulant and a mild reinforcer. Importantly, besides its unconditional effects, nicotine also has conditioned stimulus effects that may contribute to the tenacity of the smoking habit. Because the neurobiological substrates underlying these processes are virtually unexplored, the present study investigated functional involvement of dorsomedial caudate putamen (dmCPu) in the conditioning processes with nicotine as a conditioned stimulus. Rats were trained using the discriminated goal-tracking task where nicotine injections (0.4 mg/kg; SC) were paired 100% of a time with intermittent (36 per session) sucrose deliveries; sucrose was not available on alternative saline days. Pre-training excitotoxic or post-training transient lesions of anterior or posterior dmCPu were used to elucidate the role of these areas in acquisition or expression of associative learning with nicotine stimulus. Pre-training lesion of p-dmCPu inhibited acquisition while post-training lesions of p-dmCPu attenuated the expression of associative learning with the nicotine stimulus. On the other hand, post-training lesions of a-dmCPu evoked nicotine like responding following saline treatment indicating the role of this area in disinhibition of learned motor behaviors. These results for the first time show the role of a- and p-dmCPu in various stages of associative learning using nicotine stimulus and provide an initial account of neural plasticity underlying these learning processes.

الفهرسة (التفاصيل)‏‏


الموضوع
Neurosciences;
Psychobiology;
Behavioral sciences
التصنيف
0317: Neurosciences
0349: Psychobiology
0602: Behavioral Sciences
معرف / كلمة أساسية
Biological sciences; Psychology; Basal ganglia; Conditioning; Learning; Lesion; Nicotine; Striatum
العنوان
Double dissociation of the anterior and posterior dorsomedial caudate-putamen in the acquisition and expression of associative learning with the nicotine stimulus
المؤلف
Charntikov, Sergios
عدد الصفحات
103
تاريخ الدرجة
2015
رمز المدرسة
0138
المصدر
DAI-B 76/08(E), Dissertation Abstracts International
مكان النشر
Ann Arbor
بلد النشر
United States
الترقيم الدولي للكتاب
978-1-321-68019-5
المشرف
Bevins, Rick
عضو اللجنة
Leger, Daniel; Li, Ming; Zhou, You
الجامعة/المعهد
The University of Nebraska - Lincoln
القسم
Psychology
موقع الجامعة
United States -- Nebraska
الدرجة
Ph.D.
نوع المصدر
رسالة علمية أو بحث جامعي
اللغة
الإنجليزية
نوع المستند
Dissertation/Thesis
رقم الرسالة العلمية/البحث الجامعي
3689021
معرف مستند ProQuest
1674520523
حقوق النشر
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
https://www.proquest.com/unauthdocview/1674520523